Greene County, IA — Planting Guide
June in the garden — Greene County, Iowa
Welcome to June in Zone 5a. These are the moves that will have the biggest impact on your growing season.
-
Indoor seed-starting week for basil, cucumber, and kale
Your window is short. These crops want several weeks of indoor growth before they go outside.
-
Start harvesting carrots, green beans, and kale
Don't tug. Use scissors or pruners for clean cuts — torn stems invite disease.
A few tasks this June that'll pay off in July
- Starting indoors: peppers, begonias, and eggplant
- First harvests: basil, carrots, and cucumber
- Fall sowing: carrots, kale, and lettuce
Greene County is in USDA Zone 5a. The average last spring frost is April 27 and the first fall frost is October 5, giving you a growing season of approximately 161 days.
At an elevation of 1,292 ft, Greene County receives approximately 33.7 in of rainfall annually. Summer highs average 86°F with winter lows around 17°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 13 in warm years to May 11 in cold years. The growing season is trending shorter by about 0.78 days per decade. Greene County scores 71/100 (Good) on the Microclimate Index.
🌡️ Zone
5a (-20°F to -15°F min)
❄️ Last Frost
April 27
🍂 First Frost
October 5
📅 Growing Season
161 days
⛰️ Elevation
1,292 ft
🌧️ Annual Rainfall
33.7 in
Monthly Watering Calendar for Greene County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
For new gardeners: Plants need different amounts of water at different growth stages — heavy at flowering and fruit-set, lighter at establishment. Greene County's 34" annual rainfall is your starting math; the timing tells you when natural rain will cover you and when you need to step in.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.3 in | 7 days | — | None |
| Feb | 1.4 in | 6 days | — | None |
| Mar | 2.7 in | 10 days | — | None |
| Apr | 3.1 in | 10 days | 1.2 in | Moderate |
| May | 4 in | 12 days | 0.3 in | Low |
| Jun | 4.6 in | 9 days | — | Low |
| Jul | 3.3 in | 8 days | 1 in | Moderate |
| Aug | 3.6 in | 10 days | 0.7 in | Moderate |
| Sep | 2.9 in | 7 days | 1.4 in | Moderate |
| Oct | 2.4 in | 8 days | 1.9 in | High |
| Nov | 2.1 in | 7 days | — | None |
| Dec | 2.2 in | 8 days | — | None |
Annual total: 33.6 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.
Greene County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.9
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 11 | Oct 17 | 159 days |
| Cautious | May 3 | Oct 11 | 161 days |
| Average year | Apr 27 | Oct 5 | 161 days |
| Optimistic | Apr 22 | Sep 28 | 159 days |
| Aggressive (risky) | Apr 13 | Sep 20 | 160 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.
Slightly — seasons are trending a bit shorter (0.8 days/decade). Stay conservative with planting dates.
Gardening Difficulty Score
Greene County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Greene 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 Greene County's climate and soil.
County Extension Office
Greene 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 Greene County
Finding local nurseries & garden centers in Greene County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Greene 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 Greene County IA" or "garden center Greene 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 Greene County IA" or check your extension office and local parks department. Facebook groups like "Greene 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 Greene County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Quick context: A 14-hour day in June produces dramatically more photosynthesis than a 10-hour day in November. Greene County's seasonal swing determines which crops can pack growth into spring vs. limp through fall.
Longest Day
15 hours
Summer solstice daylight
Shortest Day
8.9 hours
Winter solstice daylight
Peak Sun Hours
9.7 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 | 9.3 hr | 3.6 hr | Short day |
| February | 10.4 hr | 4.5 hr | Short day |
| March | 11.7 hr | 5.5 hr | Short day |
| April | 13.1 hr | 6.6 hr | Neutral |
| May | 14.4 hr | 8.7 hr | Long day |
| June | 15 hr | 9.7 hr | Long day |
| July | 14.8 hr | 9.4 hr | Long day |
| August | 13.7 hr | 8.7 hr | Neutral |
| September | 12.3 hr | 7.1 hr | Neutral |
| October | 10.8 hr | 5.9 hr | Short day |
| November | 9.6 hr | 3.9 hr | Short day |
| December | 8.9 hr | 3.3 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Greene County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Why it matters: Soil heats slower than air in spring and cools slower in fall. That's why "warm" April air doesn't mean "plant tomatoes" — soil still trails by weeks. Greene County's monthly soil curve makes the lag visible.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Sep.
Best Month to Compost
Jun
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 | 21°F | 30°F | ❄️ Dormant | ~36 weeks |
| Feb | 22°F | 28°F | ❄️ Dormant | ~36 weeks |
| Mar | 33°F | 35°F | ❄️ Dormant | ~36 weeks |
| Apr | 43°F | 44°F | 🐢 Slow | ~24 weeks |
| May | 57°F | 55°F | ♻️ Active | ~14 weeks |
| Jun | 69°F | 63°F | 🔥 Peak | ~8 weeks |
| Jul | 74°F | 69°F | 🔥 Peak | ~8 weeks |
| Aug | 77°F | 74°F | 🔥 Peak | ~8 weeks |
| Sep | 69°F | 68°F | 🔥 Peak | ~8 weeks |
| Oct | 55°F | 60°F | ♻️ Active | ~14 weeks |
| Nov | 40°F | 47°F | ❄️ Dormant | ~36 weeks |
| Dec | 31°F | 38°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 Greene County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
For new gardeners: Two gardeners can grow identical seeds and get wildly different results based on pest pressure alone. Greene County's climate sets a floor on what's possible without intervention.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Moderate | Jun, Jul, Aug |
| Tomato hornworms | Moderate | Jul, Aug |
| Cabbage loopers | Low | May, Jun, Jul, Aug |
| Slugs | Low | Apr, May, Jun |
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 Greene County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
For new gardeners: In Greene County, cover crops also crowd out weeds. The denser the cover, the less weed pressure next season. Pays for itself in saved weeding time.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 3 | Aug 10 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 7 | Aug 3 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 30 | Aug 3 | ✓ 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 12 | Sep 21 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (6 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 5 | Apr 6 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Aug 8 | Apr 13 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 17 | Apr 6 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Aug 24 | Apr 13 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 5 | Apr 6 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 16 | Apr 6 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Greene County
Why this matters: Plants lose water through tiny leaf pores. Wind accelerates that loss dramatically — a 15 mph day can double a calm day's irrigation need. Greene County's 8.6 mph background wind is something to design around, not against. Windbreaks made of perennial shrubs save more water than any drip system.
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: 9 mph Winter: 11 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.5/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (293 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Greene County
How much water you can collect, when to collect it, and what size system you need for your garden.
Why it matters: A gravity-fed rain barrel ($75) is the easy entry. A larger cistern ($500-1500) covers a whole growing season. Greene County's 34" annual rainfall determines whether the larger system is overkill or essential.
Annual Collection
16,746 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
May, Jun, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, Feb, Nov
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 33.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 16,746 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, Feb, Nov)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Greene County
Soil Type
Silt Loam
Soil pH 5.8–6.9 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (33.7 in. annual rainfall)
Season Tips
161-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 Greene County
105 vegetables that grow well in Zone 5a with planting dates for Greene County.
Show all 105 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Mar 23 | May 4 | May 11 | — | Aug 3 – Sep 7 | 80–100 |
| Amaranth | Mar 2 | May 4 | May 11 | — | Aug 10 – Sep 28 | 90–120 |
| Arugula | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 1 – Aug 3 | 30–50 |
| Asparagus | — | — | May 11 | — | — | 730–1095 |
| Beets | — | Apr 13 | — | Jul 27 | Jun 8 – Jul 6 | 50–70 |
| Belgian Endive | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Aug 17 – Oct 12 | 110–150 |
| Bitter Melon | Mar 2 | May 4 | May 11 | — | Jul 13 – Aug 24 | 60–90 |
| Black Beans | — | May 4 | — | — | Aug 3 – Sep 21 | 90–120 |
| Bok Choy | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 8 – Jul 13 | 40–60 |
| Broccoli | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 29 – Aug 10 | 60–90 |
| Broccoli Rabe | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 8 – Jul 13 | 40–60 |
| Brussels Sprouts | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 27 – Sep 21 | 90–130 |
| Butternut Squash | Mar 23 | May 4 | May 11 | — | Aug 10 – Sep 14 | 85–110 |
| Cabbage | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 29 – Aug 24 | 60–100 |
| Calabash | Mar 2 | May 4 | May 11 | — | Aug 3 – Sep 28 | 80–120 |
| Carrots | — | Apr 13 | — | Jul 27 | Jun 15 – Jul 20 | 60–80 |
| Cauliflower | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Aug 24 | 55–100 |
| Celeriac | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Aug 10 – Sep 14 | 100–120 |
| Celery | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 20 – Sep 14 | 80–120 |
| Celtuce | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 29 – Aug 10 | 60–90 |
| Chard | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Aug 10 | 50–60 |
| Chickpeas | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 20 – Aug 31 | 80–110 |
| Chicory | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 29 – Aug 10 | 60–85 |
| Chinese Cabbage | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Jul 20 | 50–70 |
| Christmas Lima Beans | Mar 2 | May 4 | May 11 | — | Aug 3 – Sep 7 | 80–100 |
| Collard Greens | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Aug 24 | 55–75 |
| Corn | — | May 4 | — | — | Jul 6 – Aug 31 | 60–100 |
| Cowpeas | — | May 4 | — | — | Jul 6 – Aug 17 | 60–90 |
| Cress | Mar 23 | Apr 13 | Apr 27 | Jul 27 | May 11 – Jun 1 | 14–21 |
| Crookneck Squash | Mar 23 | May 4 | May 11 | — | Jun 29 – Jul 27 | 45–60 |
| Crosne | — | Apr 13 | — | Jul 27 | Sep 14 – Sep 28 | 150–200 |
| Cucumber | Mar 23 | May 4 | May 11 | — | Jul 6 – Aug 31 | 50–70 |
| Daikon | — | Apr 13 | — | Jul 27 | Jun 8 – Jul 6 | 50–70 |
| Delicata Squash | Mar 23 | May 4 | May 11 | — | Aug 3 – Sep 7 | 80–100 |
| Edamame | — | May 4 | — | — | Jul 20 – Aug 31 | 75–100 |
| Eggplant | Feb 16 | May 4 | May 11 | — | Jul 20 – Sep 21 | 65–85 |
| Endive | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 15 – Jul 20 | 45–65 |
| Escarole | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Jul 20 | 50–70 |
| Fava Beans | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 13 – Aug 24 | 75–100 |
| Fennel | Mar 2 | May 4 | May 11 | — | Jul 13 – Aug 24 | 60–90 |
| Garlic | — | — | — | Aug 24 | Nov 23 – Feb 8 | 90–240 |
| Green Beans | — | May 4 | — | — | Jun 29 – Aug 24 | 50–65 |
| Horseradish | — | — | May 11 | — | Sep 14 – Oct 26 | 120–180 |
| Hot Peppers | Feb 16 | May 4 | May 11 | — | Jul 20 – Oct 26 | 70–120 |
| Hubbard Squash | Mar 23 | May 4 | May 11 | — | Aug 24 – Sep 28 | 100–120 |
| Kabocha | Mar 23 | May 4 | May 11 | — | Aug 10 – Sep 7 | 85–100 |
| Kai Lan | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 15 – Jul 13 | 45–60 |
| Kale | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Aug 17 | 50–70 |
| Kidney Beans | — | May 4 | — | — | Aug 3 – Sep 7 | 85–110 |
| Kohlrabi | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 15 – Jul 20 | 45–65 |
| Komatsuna | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 1 – Jul 6 | 35–50 |
| Leeks | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 27 – Oct 12 | 90–150 |
| Lentils | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 20 – Aug 31 | 80–110 |
| Lettuce | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 1 – Aug 10 | 30–60 |
| Lima Beans | — | May 4 | — | — | Jul 6 – Aug 17 | 60–90 |
| Mache | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 8 – Jul 13 | 40–60 |
| Melon | Mar 23 | May 4 | May 11 | — | Jul 20 – Sep 7 | 70–100 |
| Microgreens | Mar 23 | Apr 13 | Apr 27 | Jul 27 | May 4 – Jun 1 | 7–21 |
| Mitsuba | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 15 – Aug 10 | 50–70 |
| Mizuna | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 1 – Jun 29 | 30–45 |
| Mustard Greens | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 1 – Aug 3 | 30–50 |
| Napa Cabbage | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Jul 27 | 55–75 |
| New Zealand Spinach | Mar 2 | May 4 | May 11 | — | Jul 6 – Aug 3 | 55–70 |
| Okra | Mar 2 | May 4 | May 11 | — | Jul 6 – Aug 31 | 50–65 |
| Onion | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 27 – Sep 14 | 90–120 |
| Pac Choi | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 8 – Jul 6 | 40–55 |
| Parsnip | — | Apr 13 | — | Jul 27 | Jul 27 – Sep 7 | 100–130 |
| Patty Pan Squash | Mar 23 | May 4 | May 11 | — | Jun 29 – Jul 27 | 45–60 |
| Peas | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Aug 17 | 55–70 |
| Peppers | Feb 16 | May 4 | May 11 | — | Jul 13 – Sep 21 | 60–90 |
| Pole Beans | Mar 2 | May 4 | May 11 | — | Jul 6 – Aug 31 | 55–70 |
| Potatoes | Mar 2 | May 4 | May 11 | — | Jul 20 – Sep 28 | 70–120 |
| Pumpkin | Mar 23 | May 4 | May 11 | — | Aug 10 – Sep 28 | 85–120 |
| Purslane | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 8 – Jul 13 | 40–60 |
| Radicchio | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 29 – Aug 3 | 60–80 |
| Radish | — | Apr 13 | — | Jul 27 | May 11 – Jun 1 | 22–35 |
| Rhubarb | — | — | May 18 | — | — | 365–730 |
| Romanesco | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 13 – Aug 24 | 75–100 |
| Rutabaga | — | Apr 13 | — | Jul 27 | Jul 6 – Aug 10 | 80–100 |
| Salsify | — | Apr 13 | — | Jul 27 | Jul 27 – Sep 7 | 100–130 |
| Savoy Cabbage | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 6 – Aug 31 | 70–110 |
| Scallions | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Jul 20 | 50–70 |
| Scarlet Runner Beans | Mar 2 | May 4 | May 11 | — | Jul 13 – Aug 17 | 60–80 |
| Shallot | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jul 27 – Sep 14 | 90–120 |
| Shiso | Mar 9 | May 4 | May 11 | — | Jul 6 – Aug 31 | 50–70 |
| Snap Peas | Mar 2 | May 4 | May 11 | — | Jul 6 – Aug 31 | 55–70 |
| Snow Peas | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 22 – Aug 17 | 50–65 |
| Soybeans | — | May 4 | — | — | Jul 27 – Sep 21 | 80–120 |
| Spaghetti Squash | Mar 23 | May 4 | May 11 | — | Aug 10 – Sep 7 | 85–100 |
| Spinach | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 1 – Aug 3 | 35–50 |
| Squash (Summer) | Mar 23 | May 4 | May 11 | — | Jun 29 – Aug 31 | 45–65 |
| Squash (Winter) | Mar 23 | May 4 | May 11 | — | Aug 3 – Sep 28 | 80–120 |
| Sunchoke | — | — | May 11 | — | Aug 31 – Oct 26 | 110–150 |
| Sweet Corn | — | May 4 | — | — | Jul 6 – Aug 17 | 60–90 |
| Sweet Potatoes | Mar 2 | May 4 | May 11 | — | Aug 10 – Sep 28 | 90–120 |
| Tatsoi | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 1 – Jul 6 | 35–50 |
| Tomatillo | Mar 2 | May 4 | May 11 | — | Jul 13 – Sep 21 | 60–85 |
| Tomatoes | Mar 2 | May 4 | May 11 | — | Jul 13 – Sep 21 | 60–85 |
| Turnip | — | Apr 13 | — | Jul 27 | May 25 – Jun 29 | 40–60 |
| Watercress | Mar 23 | Apr 13 | Apr 27 | Jul 27 | Jun 8 – Jul 13 | 40–60 |
| Watermelon | Mar 23 | May 4 | May 11 | — | Jul 20 – Sep 7 | 70–100 |
| Wax Beans | — | May 4 | — | — | Jun 29 – Aug 24 | 50–65 |
| Winter Melon | Mar 2 | May 4 | May 11 | — | Aug 10 – Sep 28 | 90–120 |
| Yard Long Beans | Mar 2 | May 4 | May 11 | — | Jul 6 – Aug 17 | 55–80 |
| Zucchini | Mar 23 | May 4 | May 11 | — | Jun 29 – Aug 24 | 45–60 |
🍓 Fruits to Grow in Greene County
27 fruits that grow well in Zone 5a with planting dates for Greene County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 18 | — | Aug 17 – Nov 2 | 90–180 |
| Aronia | — | — | May 18 | — | — | 730–1095 |
| Blackberries | — | — | May 18 | — | — | 365–730 |
| Blueberries | — | — | May 18 | — | — | 730–1095 |
| Boysenberries | — | — | May 18 | — | — | 365–730 |
| Cantaloupe | — | — | May 18 | — | Jul 27 – Aug 31 | 70–90 |
| Che Fruit | — | — | May 18 | — | — | 1095–1825 |
| Cranberries | — | — | May 18 | — | — | 730–1095 |
| Currants | — | — | May 18 | — | — | 730–1095 |
| Elderberries | — | — | May 18 | — | — | 730–1095 |
| Goji Berries | — | — | May 18 | — | — | 730–1095 |
| Gooseberries | — | — | May 18 | — | — | 730–1095 |
| Grapes | — | — | May 18 | — | — | 730–1095 |
| Ground Cherry | — | — | May 18 | — | Jul 27 – Sep 21 | 65–80 |
| Hardy Kiwi | — | — | May 18 | — | — | 1095–1825 |
| Haskaps | — | — | May 18 | — | — | 730–1095 |
| Honeydew | — | — | May 18 | — | Aug 10 – Sep 21 | 80–110 |
| Jostaberry | — | — | May 18 | — | — | 730–1095 |
| Lingonberries | — | — | May 18 | — | — | 730–1095 |
| Medlar | — | — | May 18 | — | — | 1095–1825 |
| Mulberries | — | — | May 18 | — | — | 730–1825 |
| Pawpaw | — | — | May 18 | — | — | 1095–2555 |
| Persimmon | — | — | May 18 | — | — | 1095–2555 |
| Quince | — | — | May 18 | — | — | 1095–1825 |
| Raspberries | — | — | May 18 | — | — | 365–730 |
| Serviceberries | — | — | May 18 | — | — | 730–1095 |
| Strawberries | — | — | May 18 | — | Aug 17 – Nov 2 | 90–365 |
🌿 Herbs to Grow in Greene County
34 herbs that grow well in Zone 5a with planting dates for Greene County.
Show all 34 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Mar 23 | Apr 13 | Apr 20 | Jul 27 | — | 365–730 |
| Anise | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jul 20 – Oct 5 | 90–120 |
| Basil | Mar 9 | May 4 | May 11 | — | Jul 6 – Sep 7 | 50–75 |
| Bee Balm | — | — | May 4 | — | Aug 3 – Oct 19 | 90–120 |
| Borage | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 15 – Aug 3 | 50–60 |
| Caraway | Mar 23 | Apr 13 | Apr 20 | Jul 27 | — | 365–450 |
| Catnip | — | — | May 4 | — | Jul 6 – Sep 7 | 60–80 |
| Chamomile | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 22 – Aug 31 | 60–90 |
| Chervil | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 1 – Aug 3 | 40–60 |
| Chives | — | — | May 4 | — | Jul 6 – Sep 14 | 60–90 |
| Cilantro | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 1 – Aug 3 | 40–60 |
| Comfrey | — | — | May 4 | — | Jul 6 – Sep 14 | 60–90 |
| Cumin | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Aug 3 – Oct 5 | 100–120 |
| Dill | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 1 – Aug 3 | 40–60 |
| Epazote | Mar 9 | May 4 | May 11 | — | Jun 29 – Aug 24 | 45–60 |
| Fennel (herb) | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 22 – Aug 31 | 60–90 |
| Feverfew | — | — | May 4 | — | Aug 3 – Oct 19 | 90–120 |
| Garlic Chives | — | — | May 4 | — | Jul 6 – Sep 14 | 60–90 |
| Horehound | — | — | May 4 | — | Jul 20 – Sep 14 | 75–90 |
| Hyssop | — | — | May 4 | — | Jul 13 – Sep 14 | 70–90 |
| Lemon Balm | — | — | May 4 | — | Jul 6 – Aug 24 | 60–70 |
| Lemon Thyme | — | — | May 4 | — | Jul 13 – Sep 14 | 70–90 |
| Lovage | — | — | May 4 | — | Jul 13 – Sep 14 | 70–90 |
| Mint | — | — | May 4 | — | Jul 6 – Sep 14 | 60–90 |
| Oregano | — | — | May 4 | — | Jul 6 – Sep 14 | 60–90 |
| Parsley | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 22 – Aug 24 | 60–80 |
| Rue | — | — | May 4 | — | Jul 13 – Sep 14 | 70–90 |
| Sage | — | — | May 4 | — | Jul 20 – Sep 14 | 75–90 |
| Savory | — | — | May 4 | — | Jun 29 – Aug 24 | 50–70 |
| Sorrel | Mar 23 | Apr 13 | Apr 20 | Jul 27 | Jun 1 – Aug 3 | 40–60 |
| Tarragon | — | — | May 4 | — | Jul 6 – Sep 14 | 60–90 |
| Thai Basil | Mar 9 | May 4 | May 11 | — | Jul 6 – Sep 7 | 50–75 |
| Thyme | — | — | May 4 | — | Jul 13 – Sep 14 | 70–90 |
| Valerian | — | — | May 4 | — | Sep 7 – Oct 19 | 120–180 |
🌸 Flowers to Grow in Greene County
51 flowers that grow well in Zone 5a with planting dates for Greene County.
Show all 51 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 9 | May 4 | May 4 | — | Jun 29 – Sep 21 | 60–75 |
| Alliums | — | — | — | Aug 24 | Sep 28 – Oct 26 | 28–42 |
| Anemones | Mar 30 | — | Apr 27 | — | Jun 8 – Jul 6 | 90–120 |
| Astilbe | Feb 23 | — | May 11 | — | Jul 27 – Sep 28 | 70–100 |
| Bachelor's Button | Mar 16 | Apr 6 | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Begonias | Feb 16 | — | May 4 | — | Jul 13 – Oct 5 | 70–90 |
| Black-eyed Susan | Feb 23 | Apr 27 | May 11 | — | Jul 27 – Oct 26 | 60–80 |
| Bleeding Hearts | Feb 23 | — | May 11 | — | Jul 6 – Aug 17 | 60–90 |
| Calendula | Mar 16 | Apr 6 | Apr 27 | — | Jun 15 – Sep 7 | 50–70 |
| Celosia | Mar 23 | May 11 | May 11 | — | Jul 13 – Oct 12 | 60–90 |
| Columbine | Feb 23 | May 11 | May 11 | — | Jul 6 – Aug 17 | 70–100 |
| Coreopsis | Feb 23 | May 4 | May 11 | — | Jul 20 – Oct 26 | 60–80 |
| Cosmos | Mar 30 | May 4 | May 4 | — | Jul 13 – Oct 5 | 60–90 |
| Crocus | — | — | — | Aug 24 | Jul 6 – Jul 27 | 10–20 |
| Daffodils | — | — | — | Aug 24 | Jul 13 – Aug 3 | 20–40 |
| Dahlias | Mar 30 | May 4 | May 4 | — | Jul 27 – Oct 19 | 70–120 |
| Daylily | Feb 23 | — | May 11 | — | Aug 3 – Oct 26 | 60–90 |
| Dianthus | Feb 23 | Mar 30 | Apr 13 | — | Jun 1 – Aug 17 | 60–80 |
| Echinacea (Purple Coneflower) | Feb 23 | May 11 | May 11 | — | Aug 3 – Oct 26 | 70–90 |
| Foxglove | Feb 23 | May 11 | May 11 | — | Jul 6 – Aug 17 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 2 | May 11 | May 11 | — | Jul 20 – Nov 9 | 70–100 |
| Geraniums | Feb 16 | — | May 4 | — | Jul 13 – Oct 5 | 70–100 |
| Gladiolus | — | May 4 | May 4 | — | Jul 27 – Oct 19 | 70–100 |
| Hostas | Feb 16 | — | May 11 | — | Aug 3 – Oct 26 | 60–90 |
| Hyacinths | — | — | — | Aug 24 | Aug 3 – Aug 31 | 14–28 |
| Hydrangeas | Feb 16 | — | May 11 | — | Jul 27 – Oct 12 | 90–150 |
| Impatiens | Mar 2 | — | May 4 | — | Jul 13 – Oct 5 | 60–75 |
| Irises | — | Division | May 11 | — | Jul 6 – Aug 10 | 60–100 |
| Larkspur | — | Mar 30 | — | — | Jun 8 – Aug 3 | 60–90 |
| Lavender | Feb 16 | — | May 18 | — | Jul 27 – Sep 7 | 90–120 |
| Lilies | — | Division | May 11 | — | Jul 20 – Oct 12 | 70–120 |
| Lobelia | Feb 16 | — | Apr 20 | — | Jun 15 – Aug 24 | 70–80 |
| Lupine | Feb 23 | May 11 | May 11 | — | Jul 6 – Aug 17 | 75–100 |
| Marigolds | Mar 16 | May 4 | May 4 | — | Jun 29 – Sep 21 | 50–70 |
| Nasturtium | Mar 30 | May 4 | May 4 | — | Jun 29 – Oct 5 | 55–65 |
| Pansy | Feb 16 | — | Apr 27 | — | Jun 22 – Aug 17 | 70–90 |
| Peonies | — | Division | May 11 | — | Jul 20 – Aug 31 | 90–120 |
| Petunia | Mar 2 | — | May 4 | — | Jul 13 – Oct 5 | 70–90 |
| Phlox | Feb 23 | May 11 | May 11 | — | Jul 27 – Oct 12 | 80–110 |
| Portulaca | Mar 23 | May 11 | May 11 | — | Jun 29 – Sep 28 | 50–70 |
| Roses | Feb 16 | — | May 11 | — | Jul 27 – Oct 26 | 90–180 |
| Salvia | Feb 23 | — | May 4 | — | Jul 13 – Oct 5 | 70–90 |
| Sedum (Stonecrop) | Feb 23 | — | May 11 | — | Sep 7 – Nov 9 | 60–90 |
| Snapdragon | Feb 16 | Apr 13 | Apr 27 | — | Jul 6 – Sep 7 | 70–100 |
| Sunflower | Apr 6 | May 4 | May 4 | — | Jul 27 – Oct 5 | 70–100 |
| Sweet Alyssum | Mar 9 | Apr 13 | Apr 27 | — | Jun 8 – Aug 17 | 45–60 |
| Sweet Pea | Mar 16 | Mar 23 | Apr 27 | — | Jul 13 – Sep 14 | 65–85 |
| Tulips | — | — | — | Aug 24 | Jul 27 – Aug 17 | 15–30 |
| Vinca (Annual) | Feb 9 | — | May 11 | — | Jul 20 – Oct 5 | 70–90 |
| Yarrow | Feb 23 | Apr 27 | May 11 | — | Jul 20 – Oct 26 | 60–90 |
| Zinnia | Mar 30 | May 4 | May 4 | — | Jul 13 – Oct 5 | 60–70 |
Monthly Planting Guide for Greene County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Greene County.
Frequently Asked Questions
What planting zone is Greene County, IA?
Greene 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 Greene County, IA?
Based on 31 years of NOAA weather station data, the median last spring frost in Greene County falls around April 27. In 8 out of 10 years, last frost lands between April 13 and May 11 — a 28-day window of variability. Use May 11 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Greene County, IA?
The median first fall frost in Greene County arrives around October 5. In cold years it can arrive as early as September 20; in mild years as late as October 17. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Greene County?
Greene County has a frost-free growing season of approximately 161 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 0.78 days per decade.
What is the soil like in Greene County for gardening?
Greene County has predominantly Silt Loam soil with a pH range of 5.8–6.9 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Greene County?
Greene County has commercial agriculture that includes Soybeans, Corn, Hay, Wheat, Hogs. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Greene County a good location for home gardening?
Greene County scores 71/100 (Good) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. This is an above-average location for home gardening with relatively predictable growing conditions.
Your Greene County Garden Planner — Free
A 22-page printable planner built for Greene 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