Dickinson County, IA — Planting Guide
Your June planting checklist for Dickinson County, Iowa
June rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Dickinson County, Iowa.
-
Indoor seed-starting week for basil, cucumber, and kale
Give them 6–8 weeks indoors before the last frost and you'll transplant into warm soil with seedlings that are already leaping.
-
Collect carrots, kale, and lettuce at their peak
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
To set up a strong July, finish these tasks
- Starting indoors: peppers, astilbe, and begonias
- First harvests: basil, carrots, and cucumber
- Fall sowing: carrots, kale, and lettuce
Dickinson County is in USDA Zone 5a. The average last spring frost is April 30 and the first fall frost is October 6, giving you a growing season of approximately 159 days.
At an elevation of 1,311 ft, Dickinson County receives approximately 33.2 in of rainfall annually. Summer highs average 84°F with winter lows around 1°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 28 days year to year — ranging from April 15 in warm years to May 14 in cold years. The growing season is trending shorter by about 2.31 days per decade. Dickinson County scores 58/100 (Moderate) on the Microclimate Index.
🌡️ Zone
5a (-20°F to -15°F min)
❄️ Last Frost
April 30
🍂 First Frost
October 6
📅 Growing Season
159 days
⛰️ Elevation
1,311 ft
🌧️ Annual Rainfall
33.2 in
Monthly Watering Calendar for Dickinson County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
Why this matters: Mulch reduces watering needs 30-50% by cutting evaporation. Dickinson County's 33" annual rainfall might be enough for vegetables in some months and not in others — a 2-3" mulch layer evens the swing.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.2 in | 8 days | — | None |
| Feb | 1.4 in | 7 days | — | None |
| Mar | 2.5 in | 9 days | — | None |
| Apr | 3.6 in | 11 days | 0.7 in | Moderate |
| May | 3.5 in | 10 days | 0.8 in | Moderate |
| Jun | 4.3 in | 10 days | — | Low |
| Jul | 3.3 in | 7 days | 1 in | Moderate |
| Aug | 3.9 in | 10 days | 0.4 in | Low |
| Sep | 2.8 in | 8 days | 1.5 in | Moderate |
| Oct | 2.3 in | 7 days | 2 in | High |
| Nov | 2.5 in | 8 days | — | None |
| Dec | 2 in | 8 days | — | None |
Annual total: 33.3 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Dickinson County Soil Profile
Soil Type
Silt Loam
Soil pH
5.7-7
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | May 14 | Oct 21 | 160 days |
| Cautious | May 4 | Oct 11 | 160 days |
| Average year | Apr 30 | Oct 6 | 159 days |
| Optimistic | Apr 22 | Oct 2 | 163 days |
| Aggressive (risky) | Apr 15 | Sep 19 | 157 days |
Not very — frost dates can vary by ±28 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting shorter here (about 2.3 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Dickinson County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Dickinson County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Dickinson County's climate and soil.
County Extension Office
Dickinson County Iowa State University Extension Extension Office
Phone: 515-294-6675
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Dickinson County
Finding local nurseries & garden centers in Dickinson County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Dickinson County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Dickinson County IA" or "garden center Dickinson County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Dickinson County IA" or check your extension office and local parks department. Facebook groups like "Dickinson County Gardeners" or "Iowa Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Show 6 more succession options
Sunlight & Day Length in Dickinson County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
What this means for you: You can't change the sun. Picking the right day-length-matched varieties for Dickinson County matters more than any other "fix" you make — and the seed packet tells you (look for "long-day," "short-day," "day-neutral").
Longest Day
15.2 hours
Summer solstice daylight
Shortest Day
8.8 hours
Winter solstice daylight
Peak Sun Hours
10 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.1 hr | 3.5 hr | Short day |
| February | 10.3 hr | 4.5 hr | Short day |
| March | 11.6 hr | 5.5 hr | Short day |
| April | 13.2 hr | 7 hr | Neutral |
| May | 14.5 hr | 8.6 hr | Long day |
| June | 15.2 hr | 9.7 hr | Long day |
| July | 14.9 hr | 10 hr | Long day |
| August | 13.8 hr | 8.9 hr | Neutral |
| September | 12.3 hr | 6.9 hr | Neutral |
| October | 10.8 hr | 5.5 hr | Short day |
| November | 9.4 hr | 3.8 hr | Short day |
| December | 8.8 hr | 3.4 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Dickinson County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
What this means for you: Cold soil = stunted starts. A bean seed planted in 55°F soil rots before it germinates. Same seed in 65°F soil sprouts in 5 days. Dickinson County's soil temperature pattern shows you the difference month to month.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Sep.
Best Month to Compost
Jul
Microbial activity peaks when soil is warm.
Active Composting
6 months
Solid season. Piles go dormant in winter.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 12°F | 23°F | ❄️ Dormant | ~36 weeks |
| Feb | 15°F | 23°F | ❄️ Dormant | ~36 weeks |
| Mar | 26°F | 29°F | ❄️ Dormant | ~36 weeks |
| Apr | 41°F | 40°F | 🐢 Slow | ~24 weeks |
| May | 52°F | 49°F | ♻️ Active | ~14 weeks |
| Jun | 64°F | 59°F | ♻️ Active | ~14 weeks |
| Jul | 70°F | 64°F | 🔥 Peak | ~8 weeks |
| Aug | 74°F | 69°F | 🔥 Peak | ~8 weeks |
| Sep | 64°F | 65°F | ♻️ Active | ~14 weeks |
| Oct | 50°F | 53°F | ♻️ Active | ~14 weeks |
| Nov | 37°F | 43°F | ❄️ Dormant | ~36 weeks |
| Dec | 23°F | 31°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Dickinson County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Quick context: Pest and disease pressure is the X-factor most beginners under-plan for. Dickinson County's climate determines whether you can mostly "plant and see" or whether you need a pest-management routine from the first seedling.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 5 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Cabbage worms | Moderate | Jun, Jul, Aug |
| Colorado potato beetle | Moderate | Jun, Jul |
| Flea beetles | Moderate | May, Jun, Jul |
| Slugs | Moderate | May, Jun, Jul, Aug, Sep |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Dickinson County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
Quick context: The "chop and drop" approach to cover crops: cut them down right before flowering, let them lay on the surface as mulch, plant your vegetables through the mulch. Less work, healthier soil.
Spring Cover Crops (2 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 30 | Jul 28 | — | Rapid growth, attracts pollinators, suppresses weeds |
| White clover | Apr 5 | Aug 4 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | May 16 | Sep 8 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (5 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Daikon radish | Aug 23 | Apr 9 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 27 | Apr 16 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 27 | Apr 16 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 4 | Apr 9 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 17 | Apr 16 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Dickinson County
Why it matters: New gardeners under-plan for wind. Dickinson County averages 9.1 mph — fine for most days. But every region has its windy days, and the first time a row of unstaked peppers leans over after a storm is a lesson you only need once.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 9 mph
Fall: 10 mph Winter: 13 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.2/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (264 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Dickinson County
How much water you can collect, when to collect it, and what size system you need for your garden.
What this means for you: The first inch of rain washes the roof clean — a first-flush diverter sends it to waste before the barrel fills. Worth the extra $20 for cleaner garden water. Dickinson County gets 33" annually, so you'll fill and flush many times per year.
Annual Collection
16,596 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 1,750 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Apr, May, Jun, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, Feb, Dec
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 33.3 inches of rain per year
- A 1,000 sq ft roof can collect roughly 16,596 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, Feb, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Dickinson County
Soil Type
Silt Loam
Soil pH 5.7–7 · Moderately Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 5.5/10
Moderate drought pressure. Drip irrigation and mulching are highly recommended to maintain soil moisture through summer.
Season Tips
159-day frost-free season
Start warm-season crops indoors and focus on short-season varieties. Cold frames extend your season by 3–4 weeks in fall.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 22-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Dickinson County
105 vegetables that grow well in Zone 5a with planting dates for Dickinson County.
Show all 105 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Mar 26 | May 7 | May 14 | — | Aug 6 – Sep 10 | 80–100 |
| Amaranth | Mar 5 | May 7 | May 14 | — | Aug 13 – Oct 1 | 90–120 |
| Arugula | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 4 – Aug 6 | 30–50 |
| Asparagus | — | — | May 14 | — | — | 730–1095 |
| Beets | — | Apr 16 | — | Jul 28 | Jun 11 – Jul 9 | 50–70 |
| Belgian Endive | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Aug 20 – Oct 15 | 110–150 |
| Bitter Melon | Mar 5 | May 7 | May 14 | — | Jul 16 – Aug 27 | 60–90 |
| Black Beans | — | May 7 | — | — | Aug 6 – Sep 24 | 90–120 |
| Bok Choy | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 11 – Jul 16 | 40–60 |
| Broccoli | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 2 – Aug 13 | 60–90 |
| Broccoli Rabe | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 11 – Jul 16 | 40–60 |
| Brussels Sprouts | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 30 – Sep 24 | 90–130 |
| Butternut Squash | Mar 26 | May 7 | May 14 | — | Aug 13 – Sep 17 | 85–110 |
| Cabbage | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 2 – Aug 27 | 60–100 |
| Calabash | Mar 5 | May 7 | May 14 | — | Aug 6 – Oct 1 | 80–120 |
| Carrots | — | Apr 16 | — | Jul 28 | Jun 18 – Jul 23 | 60–80 |
| Cauliflower | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Aug 27 | 55–100 |
| Celeriac | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Aug 13 – Sep 17 | 100–120 |
| Celery | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 23 – Sep 17 | 80–120 |
| Celtuce | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 2 – Aug 13 | 60–90 |
| Chard | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Aug 13 | 50–60 |
| Chickpeas | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 23 – Sep 3 | 80–110 |
| Chicory | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 2 – Aug 13 | 60–85 |
| Chinese Cabbage | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Jul 23 | 50–70 |
| Christmas Lima Beans | Mar 5 | May 7 | May 14 | — | Aug 6 – Sep 10 | 80–100 |
| Collard Greens | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Aug 27 | 55–75 |
| Corn | — | May 7 | — | — | Jul 9 – Sep 3 | 60–100 |
| Cowpeas | — | May 7 | — | — | Jul 9 – Aug 20 | 60–90 |
| Cress | Mar 26 | Apr 16 | Apr 30 | Jul 28 | May 14 – Jun 4 | 14–21 |
| Crookneck Squash | Mar 26 | May 7 | May 14 | — | Jul 2 – Jul 30 | 45–60 |
| Crosne | — | Apr 16 | — | Jul 28 | Sep 17 – Oct 1 | 150–200 |
| Cucumber | Mar 26 | May 7 | May 14 | — | Jul 9 – Sep 3 | 50–70 |
| Daikon | — | Apr 16 | — | Jul 28 | Jun 11 – Jul 9 | 50–70 |
| Delicata Squash | Mar 26 | May 7 | May 14 | — | Aug 6 – Sep 10 | 80–100 |
| Edamame | — | May 7 | — | — | Jul 23 – Sep 3 | 75–100 |
| Eggplant | Feb 19 | May 7 | May 14 | — | Jul 23 – Sep 24 | 65–85 |
| Endive | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 18 – Jul 23 | 45–65 |
| Escarole | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Jul 23 | 50–70 |
| Fava Beans | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 16 – Aug 27 | 75–100 |
| Fennel | Mar 5 | May 7 | May 14 | — | Jul 16 – Aug 27 | 60–90 |
| Garlic | — | — | — | Aug 25 | Nov 24 – Feb 9 | 90–240 |
| Green Beans | — | May 7 | — | — | Jul 2 – Aug 27 | 50–65 |
| Horseradish | — | — | May 14 | — | Sep 17 – Oct 29 | 120–180 |
| Hot Peppers | Feb 19 | May 7 | May 14 | — | Jul 23 – Oct 29 | 70–120 |
| Hubbard Squash | Mar 26 | May 7 | May 14 | — | Aug 27 – Oct 1 | 100–120 |
| Kabocha | Mar 26 | May 7 | May 14 | — | Aug 13 – Sep 10 | 85–100 |
| Kai Lan | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 18 – Jul 16 | 45–60 |
| Kale | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Aug 20 | 50–70 |
| Kidney Beans | — | May 7 | — | — | Aug 6 – Sep 10 | 85–110 |
| Kohlrabi | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 18 – Jul 23 | 45–65 |
| Komatsuna | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 4 – Jul 9 | 35–50 |
| Leeks | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 30 – Oct 15 | 90–150 |
| Lentils | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 23 – Sep 3 | 80–110 |
| Lettuce | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 4 – Aug 13 | 30–60 |
| Lima Beans | — | May 7 | — | — | Jul 9 – Aug 20 | 60–90 |
| Mache | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 11 – Jul 16 | 40–60 |
| Melon | Mar 26 | May 7 | May 14 | — | Jul 23 – Sep 10 | 70–100 |
| Microgreens | Mar 26 | Apr 16 | Apr 30 | Jul 28 | May 7 – Jun 4 | 7–21 |
| Mitsuba | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 18 – Aug 13 | 50–70 |
| Mizuna | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 4 – Jul 2 | 30–45 |
| Mustard Greens | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 4 – Aug 6 | 30–50 |
| Napa Cabbage | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Jul 30 | 55–75 |
| New Zealand Spinach | Mar 5 | May 7 | May 14 | — | Jul 9 – Aug 6 | 55–70 |
| Okra | Mar 5 | May 7 | May 14 | — | Jul 9 – Sep 3 | 50–65 |
| Onion | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 30 – Sep 17 | 90–120 |
| Pac Choi | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 11 – Jul 9 | 40–55 |
| Parsnip | — | Apr 16 | — | Jul 28 | Jul 30 – Sep 10 | 100–130 |
| Patty Pan Squash | Mar 26 | May 7 | May 14 | — | Jul 2 – Jul 30 | 45–60 |
| Peas | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Aug 20 | 55–70 |
| Peppers | Feb 19 | May 7 | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Pole Beans | Mar 5 | May 7 | May 14 | — | Jul 9 – Sep 3 | 55–70 |
| Potatoes | Mar 5 | May 7 | May 14 | — | Jul 23 – Oct 1 | 70–120 |
| Pumpkin | Mar 26 | May 7 | May 14 | — | Aug 13 – Oct 1 | 85–120 |
| Purslane | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 11 – Jul 16 | 40–60 |
| Radicchio | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 2 – Aug 6 | 60–80 |
| Radish | — | Apr 16 | — | Jul 28 | May 14 – Jun 4 | 22–35 |
| Rhubarb | — | — | May 21 | — | — | 365–730 |
| Romanesco | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 16 – Aug 27 | 75–100 |
| Rutabaga | — | Apr 16 | — | Jul 28 | Jul 9 – Aug 13 | 80–100 |
| Salsify | — | Apr 16 | — | Jul 28 | Jul 30 – Sep 10 | 100–130 |
| Savoy Cabbage | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 9 – Sep 3 | 70–110 |
| Scallions | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Jul 23 | 50–70 |
| Scarlet Runner Beans | Mar 5 | May 7 | May 14 | — | Jul 16 – Aug 20 | 60–80 |
| Shallot | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jul 30 – Sep 17 | 90–120 |
| Shiso | Mar 12 | May 7 | May 14 | — | Jul 9 – Sep 3 | 50–70 |
| Snap Peas | Mar 5 | May 7 | May 14 | — | Jul 9 – Sep 3 | 55–70 |
| Snow Peas | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 25 – Aug 20 | 50–65 |
| Soybeans | — | May 7 | — | — | Jul 30 – Sep 24 | 80–120 |
| Spaghetti Squash | Mar 26 | May 7 | May 14 | — | Aug 13 – Sep 10 | 85–100 |
| Spinach | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 4 – Aug 6 | 35–50 |
| Squash (Summer) | Mar 26 | May 7 | May 14 | — | Jul 2 – Sep 3 | 45–65 |
| Squash (Winter) | Mar 26 | May 7 | May 14 | — | Aug 6 – Oct 1 | 80–120 |
| Sunchoke | — | — | May 14 | — | Sep 3 – Oct 29 | 110–150 |
| Sweet Corn | — | May 7 | — | — | Jul 9 – Aug 20 | 60–90 |
| Sweet Potatoes | Mar 5 | May 7 | May 14 | — | Aug 13 – Oct 1 | 90–120 |
| Tatsoi | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 4 – Jul 9 | 35–50 |
| Tomatillo | Mar 5 | May 7 | May 14 | — | Jul 16 – Sep 24 | 60–85 |
| Tomatoes | Mar 5 | May 7 | May 14 | — | Jul 16 – Sep 24 | 60–85 |
| Turnip | — | Apr 16 | — | Jul 28 | May 28 – Jul 2 | 40–60 |
| Watercress | Mar 26 | Apr 16 | Apr 30 | Jul 28 | Jun 11 – Jul 16 | 40–60 |
| Watermelon | Mar 26 | May 7 | May 14 | — | Jul 23 – Sep 10 | 70–100 |
| Wax Beans | — | May 7 | — | — | Jul 2 – Aug 27 | 50–65 |
| Winter Melon | Mar 5 | May 7 | May 14 | — | Aug 13 – Oct 1 | 90–120 |
| Yard Long Beans | Mar 5 | May 7 | May 14 | — | Jul 9 – Aug 20 | 55–80 |
| Zucchini | Mar 26 | May 7 | May 14 | — | Jul 2 – Aug 27 | 45–60 |
🍓 Fruits to Grow in Dickinson County
27 fruits that grow well in Zone 5a with planting dates for Dickinson County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 21 | — | Aug 20 – Nov 5 | 90–180 |
| Aronia | — | — | May 21 | — | — | 730–1095 |
| Blackberries | — | — | May 21 | — | — | 365–730 |
| Blueberries | — | — | May 21 | — | — | 730–1095 |
| Boysenberries | — | — | May 21 | — | — | 365–730 |
| Cantaloupe | — | — | May 21 | — | Jul 30 – Sep 3 | 70–90 |
| Che Fruit | — | — | May 21 | — | — | 1095–1825 |
| Cranberries | — | — | May 21 | — | — | 730–1095 |
| Currants | — | — | May 21 | — | — | 730–1095 |
| Elderberries | — | — | May 21 | — | — | 730–1095 |
| Goji Berries | — | — | May 21 | — | — | 730–1095 |
| Gooseberries | — | — | May 21 | — | — | 730–1095 |
| Grapes | — | — | May 21 | — | — | 730–1095 |
| Ground Cherry | — | — | May 21 | — | Jul 30 – Sep 24 | 65–80 |
| Hardy Kiwi | — | — | May 21 | — | — | 1095–1825 |
| Haskaps | — | — | May 21 | — | — | 730–1095 |
| Honeydew | — | — | May 21 | — | Aug 13 – Sep 24 | 80–110 |
| Jostaberry | — | — | May 21 | — | — | 730–1095 |
| Lingonberries | — | — | May 21 | — | — | 730–1095 |
| Medlar | — | — | May 21 | — | — | 1095–1825 |
| Mulberries | — | — | May 21 | — | — | 730–1825 |
| Pawpaw | — | — | May 21 | — | — | 1095–2555 |
| Persimmon | — | — | May 21 | — | — | 1095–2555 |
| Quince | — | — | May 21 | — | — | 1095–1825 |
| Raspberries | — | — | May 21 | — | — | 365–730 |
| Serviceberries | — | — | May 21 | — | — | 730–1095 |
| Strawberries | — | — | May 21 | — | Aug 20 – Nov 5 | 90–365 |
🌿 Herbs to Grow in Dickinson County
34 herbs that grow well in Zone 5a with planting dates for Dickinson County.
Show all 34 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Mar 26 | Apr 16 | Apr 23 | Jul 28 | — | 365–730 |
| Anise | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jul 23 – Oct 8 | 90–120 |
| Basil | Mar 12 | May 7 | May 14 | — | Jul 9 – Sep 10 | 50–75 |
| Bee Balm | — | — | May 7 | — | Aug 6 – Oct 22 | 90–120 |
| Borage | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 18 – Aug 6 | 50–60 |
| Caraway | Mar 26 | Apr 16 | Apr 23 | Jul 28 | — | 365–450 |
| Catnip | — | — | May 7 | — | Jul 9 – Sep 10 | 60–80 |
| Chamomile | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 25 – Sep 3 | 60–90 |
| Chervil | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 4 – Aug 6 | 40–60 |
| Chives | — | — | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Cilantro | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 4 – Aug 6 | 40–60 |
| Comfrey | — | — | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Cumin | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Aug 6 – Oct 8 | 100–120 |
| Dill | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 4 – Aug 6 | 40–60 |
| Epazote | Mar 12 | May 7 | May 14 | — | Jul 2 – Aug 27 | 45–60 |
| Fennel (herb) | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 25 – Sep 3 | 60–90 |
| Feverfew | — | — | May 7 | — | Aug 6 – Oct 22 | 90–120 |
| Garlic Chives | — | — | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Horehound | — | — | May 7 | — | Jul 23 – Sep 17 | 75–90 |
| Hyssop | — | — | May 7 | — | Jul 16 – Sep 17 | 70–90 |
| Lemon Balm | — | — | May 7 | — | Jul 9 – Aug 27 | 60–70 |
| Lemon Thyme | — | — | May 7 | — | Jul 16 – Sep 17 | 70–90 |
| Lovage | — | — | May 7 | — | Jul 16 – Sep 17 | 70–90 |
| Mint | — | — | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Oregano | — | — | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Parsley | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 25 – Aug 27 | 60–80 |
| Rue | — | — | May 7 | — | Jul 16 – Sep 17 | 70–90 |
| Sage | — | — | May 7 | — | Jul 23 – Sep 17 | 75–90 |
| Savory | — | — | May 7 | — | Jul 2 – Aug 27 | 50–70 |
| Sorrel | Mar 26 | Apr 16 | Apr 23 | Jul 28 | Jun 4 – Aug 6 | 40–60 |
| Tarragon | — | — | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Thai Basil | Mar 12 | May 7 | May 14 | — | Jul 9 – Sep 10 | 50–75 |
| Thyme | — | — | May 7 | — | Jul 16 – Sep 17 | 70–90 |
| Valerian | — | — | May 7 | — | Sep 10 – Oct 22 | 120–180 |
🌸 Flowers to Grow in Dickinson County
51 flowers that grow well in Zone 5a with planting dates for Dickinson County.
Show all 51 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 12 | May 7 | May 7 | — | Jul 2 – Sep 24 | 60–75 |
| Alliums | — | — | — | Aug 25 | Sep 29 – Oct 27 | 28–42 |
| Anemones | Apr 2 | — | Apr 30 | — | Jun 11 – Jul 9 | 90–120 |
| Astilbe | Feb 26 | — | May 14 | — | Jul 30 – Oct 1 | 70–100 |
| Bachelor's Button | Mar 19 | Apr 9 | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Begonias | Feb 19 | — | May 7 | — | Jul 16 – Oct 8 | 70–90 |
| Black-eyed Susan | Feb 26 | Apr 30 | May 14 | — | Jul 30 – Oct 29 | 60–80 |
| Bleeding Hearts | Feb 26 | — | May 14 | — | Jul 9 – Aug 20 | 60–90 |
| Calendula | Mar 19 | Apr 9 | Apr 30 | — | Jun 18 – Sep 10 | 50–70 |
| Celosia | Mar 26 | May 14 | May 14 | — | Jul 16 – Oct 15 | 60–90 |
| Columbine | Feb 26 | May 14 | May 14 | — | Jul 9 – Aug 20 | 70–100 |
| Coreopsis | Feb 26 | May 7 | May 14 | — | Jul 23 – Oct 29 | 60–80 |
| Cosmos | Apr 2 | May 7 | May 7 | — | Jul 16 – Oct 8 | 60–90 |
| Crocus | — | — | — | Aug 25 | Jul 7 – Jul 28 | 10–20 |
| Daffodils | — | — | — | Aug 25 | Jul 14 – Aug 4 | 20–40 |
| Dahlias | Apr 2 | May 7 | May 7 | — | Jul 30 – Oct 22 | 70–120 |
| Daylily | Feb 26 | — | May 14 | — | Aug 6 – Oct 29 | 60–90 |
| Dianthus | Feb 26 | Apr 2 | Apr 16 | — | Jun 4 – Aug 20 | 60–80 |
| Echinacea (Purple Coneflower) | Feb 26 | May 14 | May 14 | — | Aug 6 – Oct 29 | 70–90 |
| Foxglove | Feb 26 | May 14 | May 14 | — | Jul 9 – Aug 20 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 5 | May 14 | May 14 | — | Jul 23 – Nov 12 | 70–100 |
| Geraniums | Feb 19 | — | May 7 | — | Jul 16 – Oct 8 | 70–100 |
| Gladiolus | — | May 7 | May 7 | — | Jul 30 – Oct 22 | 70–100 |
| Hostas | Feb 19 | — | May 14 | — | Aug 6 – Oct 29 | 60–90 |
| Hyacinths | — | — | — | Aug 25 | Aug 4 – Sep 1 | 14–28 |
| Hydrangeas | Feb 19 | — | May 14 | — | Jul 30 – Oct 15 | 90–150 |
| Impatiens | Mar 5 | — | May 7 | — | Jul 16 – Oct 8 | 60–75 |
| Irises | — | Division | May 14 | — | Jul 9 – Aug 13 | 60–100 |
| Larkspur | — | Apr 2 | — | — | Jun 11 – Aug 6 | 60–90 |
| Lavender | Feb 19 | — | May 21 | — | Jul 30 – Sep 10 | 90–120 |
| Lilies | — | Division | May 14 | — | Jul 23 – Oct 15 | 70–120 |
| Lobelia | Feb 19 | — | Apr 23 | — | Jun 18 – Aug 27 | 70–80 |
| Lupine | Feb 26 | May 14 | May 14 | — | Jul 9 – Aug 20 | 75–100 |
| Marigolds | Mar 19 | May 7 | May 7 | — | Jul 2 – Sep 24 | 50–70 |
| Nasturtium | Apr 2 | May 7 | May 7 | — | Jul 2 – Oct 8 | 55–65 |
| Pansy | Feb 19 | — | Apr 30 | — | Jun 25 – Aug 20 | 70–90 |
| Peonies | — | Division | May 14 | — | Jul 23 – Sep 3 | 90–120 |
| Petunia | Mar 5 | — | May 7 | — | Jul 16 – Oct 8 | 70–90 |
| Phlox | Feb 26 | May 14 | May 14 | — | Jul 30 – Oct 15 | 80–110 |
| Portulaca | Mar 26 | May 14 | May 14 | — | Jul 2 – Oct 1 | 50–70 |
| Roses | Feb 19 | — | May 14 | — | Jul 30 – Oct 29 | 90–180 |
| Salvia | Feb 26 | — | May 7 | — | Jul 16 – Oct 8 | 70–90 |
| Sedum (Stonecrop) | Feb 26 | — | May 14 | — | Sep 10 – Nov 12 | 60–90 |
| Snapdragon | Feb 19 | Apr 16 | Apr 30 | — | Jul 9 – Sep 10 | 70–100 |
| Sunflower | Apr 9 | May 7 | May 7 | — | Jul 30 – Oct 8 | 70–100 |
| Sweet Alyssum | Mar 12 | Apr 16 | Apr 30 | — | Jun 11 – Aug 20 | 45–60 |
| Sweet Pea | Mar 19 | Mar 26 | Apr 30 | — | Jul 16 – Sep 17 | 65–85 |
| Tulips | — | — | — | Aug 25 | Jul 28 – Aug 18 | 15–30 |
| Vinca (Annual) | Feb 12 | — | May 14 | — | Jul 23 – Oct 8 | 70–90 |
| Yarrow | Feb 26 | Apr 30 | May 14 | — | Jul 23 – Oct 29 | 60–90 |
| Zinnia | Apr 2 | May 7 | May 7 | — | Jul 16 – Oct 8 | 60–70 |
Monthly Planting Guide for Dickinson County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Dickinson County.
Frequently Asked Questions
What planting zone is Dickinson County, IA?
Dickinson County is in USDA Hardiness Zone 5a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Dickinson County, IA?
Based on 31 years of NOAA weather station data, the median last spring frost in Dickinson County falls around April 30. In 8 out of 10 years, last frost lands between April 15 and May 14 — a 28-day window of variability. Use May 14 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Dickinson County, IA?
The median first fall frost in Dickinson County arrives around October 6. In cold years it can arrive as early as September 19; in mild years as late as October 21. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Dickinson County?
Dickinson County has a frost-free growing season of approximately 159 days. This is enough time for most warm-season crops including tomatoes, peppers, and squash with proper timing. Climate records show the growing season is trending shorter by about 2.31 days per decade.
What is the soil like in Dickinson County for gardening?
Dickinson County has predominantly Silt Loam soil with a pH range of 5.7–7 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Dickinson County?
Dickinson County has commercial agriculture that includes Soybeans, Corn, Hay. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Dickinson County a good location for home gardening?
Dickinson County scores 58/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Your Dickinson County Garden Planner — Free
A 22-page printable planner built for Dickinson County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log