Rolla, KS — Planting Guide for June
Free PDF, personalized for your town's frost dates & climate. Drop your email — we'll send the link.
Rolla has a classic four-season growing climate (Zone 6b). The last spring frost typically lands around April 20 and the first fall frost arrives around October 17 — a 180-day frost-free season that's long enough for tomatoes, peppers, melons, and a full succession of cool-weather crops on either side. The trick is timing: start warm-season seedlings indoors 6–8 weeks before last frost, harden them off, and plant out the week after your local frost date is statistically safe.
Soils trend Loam — the gold standard for vegetables. Add 2–3" of compost annually to maintain it and you'll outgrow most of your neighbors.
Rolla averages 33.0 drought weeks per year (US Drought Monitor, 2000–present, trend stable). Treat irrigation as a year-round system, not a summer add-on.
🌡️ USDA Zone
6b (-5°F to 0°F min)
❄️ Avg. Last Frost
April 20
🍂 Avg. First Frost
October 17
📅 Growing Season
180 days
🌧️ Climate
Unknown 0.0" annual
💨 Wind
Breezy 10.9 mph avg
🥶 Frost Tier
Regular 0% frost-free years
🏜️ Drought
33.0 wk/yr trend stable
📍 ZIP Codes
1 ZIP
Monthly Watering Calendar for Rolla
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
For new gardeners: In humid climates, watering is usually about timing (morning, not evening, to prevent disease) more than volume. In dry climates, it's about depth (water deep, less often) more than frequency. Rolla's 0" annual tells you which side you're on.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.8 in | 6 days | — | None |
| Feb | 1.4 in | 5 days | — | None |
| Mar | 2.2 in | 8 days | 2.1 in | High |
| Apr | 2.3 in | 9 days | 2 in | High |
| May | 2.5 in | 6 days | 1.8 in | High |
| Jun | 1.8 in | 4 days | 2.5 in | High |
| Jul | 2.1 in | 6 days | 2.2 in | High |
| Aug | 2.4 in | 7 days | 1.9 in | High |
| Sep | 1.8 in | 6 days | 2.5 in | High |
| Oct | 2.3 in | 6 days | 2 in | High |
| Nov | 1.5 in | 5 days | — | None |
| Dec | 1.5 in | 7 days | — | None |
Annual total: 23.6 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.
Rolla Soil Profile
Soil Type
Loam
Soil pH
6.7-7.4
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 3 | Nov 3 | 184 days |
| Cautious | Apr 27 | Oct 24 | 180 days |
| Average year | Apr 20 | Oct 17 | 180 days |
| Optimistic | Apr 14 | Oct 13 | 182 days |
| Aggressive (risky) | Apr 4 | Oct 2 | 181 days |
Not very — frost dates can vary by ±29 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 longer here (about 2.6 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Morton County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Morton 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 Morton County's climate and soil.
County Extension Office
Morton County Kansas State University Extension Extension Office
Phone: 785-532-5820
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 Morton County
Finding local nurseries & garden centers in Morton County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Morton 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 Morton County KS" or "garden center Morton 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 Morton County KS" or check your extension office and local parks department. Facebook groups like "Morton County Gardeners" or "Kansas 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 Rolla
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
For new gardeners: Day length triggers flowering in many crops. Some need short days (sweet potatoes), some long (most flowers), and some are day-neutral (most modern tomatoes). Rolla's latitude determines which varieties fit your beds.
Longest Day
14.5 hours
Summer solstice daylight
Shortest Day
9.5 hours
Winter solstice daylight
Peak Sun Hours
10.2 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 | 9.7 hr | 5.5 hr | Short day |
| February | 10.6 hr | 6.1 hr | Short day |
| March | 11.7 hr | 7 hr | Short day |
| April | 13 hr | 7.9 hr | Neutral |
| May | 14 hr | 8.9 hr | Long day |
| June | 14.5 hr | 10.2 hr | Long day |
| July | 14.3 hr | 10 hr | Long day |
| August | 13.4 hr | 9.8 hr | Neutral |
| September | 12.2 hr | 8.1 hr | Neutral |
| October | 11 hr | 6.8 hr | Short day |
| November | 10 hr | 6 hr | Short day |
| December | 9.5 hr | 5.1 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Rolla
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Why this matters: Compost piles need 130-160°F internal temp to actively break down. Below 50°F ambient, microbial activity slows dramatically. Rolla's soil temperature curve also tells you when your compost is working and when it's napping.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from May through Oct.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
7 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 | 32°F | 39°F | ❄️ Dormant | ~36 weeks |
| Feb | 32°F | 37°F | ❄️ Dormant | ~36 weeks |
| Mar | 41°F | 44°F | 🐢 Slow | ~24 weeks |
| Apr | 50°F | 52°F | ♻️ Active | ~14 weeks |
| May | 62°F | 59°F | ♻️ Active | ~14 weeks |
| Jun | 75°F | 68°F | 🔥 Peak | ~8 weeks |
| Jul | 82°F | 77°F | 🔥 Peak | ~8 weeks |
| Aug | 82°F | 79°F | 🔥 Peak | ~8 weeks |
| Sep | 75°F | 76°F | 🔥 Peak | ~8 weeks |
| Oct | 65°F | 66°F | ♻️ Active | ~14 weeks |
| Nov | 48°F | 54°F | 🐢 Slow | ~24 weeks |
| Dec | 39°F | 45°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 Rolla
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Why this matters: Pest pressure scales with warmth and humidity. Hot humid Rolla sees year-round bugs and fungal disease; cold dry regions see almost none. A high pest score means crop rotation, resistant varieties, and a weekly pest-watch routine from day one.
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 | High | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Low | May, Jun, Jul |
| Stink bugs | Moderate | Jun, Jul, Aug, Sep |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Cover Crops for Rolla
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
Why it matters: 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 (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 27 | Aug 15 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Apr 28 | Aug 8 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 26 | Aug 15 | ✓ 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 15 | Sep 26 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 6 | Apr 6 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 18 | Mar 30 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Aug 21 | Apr 6 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 27 | Mar 30 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 7 | Apr 6 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 9 | Apr 6 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 28 | Mar 30 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Rolla
What this means for you: Plants lose water through tiny leaf pores. Wind accelerates that loss dramatically — a 15 mph day can double a calm day's irrigation need. Rolla's 10.9 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: 17 mph Summer: 12 mph
Fall: 13 mph Winter: 14 mph
Prevailing wind: S. Windy area — plant a windbreak hedge on the S side of your garden.
Windbreak Benefit
7.2/10
Strongly recommended — a windbreak (fence, hedge, or row of tall crops like corn or sunflowers) will significantly improve garden yields.
Frost Pocket Risk
Low
Relatively flat terrain (351 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting in Rolla
How much water you can collect, when to collect it, and what size system you need for your garden.
Why this matters: 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. Rolla gets 0" annually, so you'll fill and flush many times per year.
Annual Collection
11,762 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
7 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, Aug, Oct
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, Nov, 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 23.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 11,762 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Feb, Nov, Dec)
- Use a first-flush diverter to keep roof debris out of your collection
🥬 Vegetables to Grow in Rolla
107 vegetables matched to Zone 6b with planting dates calibrated for Rolla.
Show all 107 vegetables with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Mar 16 | Apr 27 | May 4 | — | Jul 27 – Aug 31 | 80–100 |
| Amaranth | Feb 23 | Apr 27 | May 4 | — | Aug 3 – Sep 21 | 90–120 |
| Arugula | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 25 – Jul 27 | 30–50 |
| Asparagus | — | — | May 4 | — | — | 730–1095 |
| Beets | — | Apr 6 | — | Aug 8 | Jun 1 – Jun 29 | 50–70 |
| Belgian Endive | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Aug 10 – Oct 5 | 110–150 |
| Bitter Melon | Feb 23 | Apr 27 | May 4 | — | Jul 6 – Aug 17 | 60–90 |
| Black Beans | — | Apr 27 | — | — | Jul 27 – Sep 14 | 90–120 |
| Bok Choy | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 1 – Jul 6 | 40–60 |
| Broccoli | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 22 – Aug 3 | 60–90 |
| Broccoli Rabe | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 1 – Jul 6 | 40–60 |
| Brussels Sprouts | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 20 – Sep 14 | 90–130 |
| Butternut Squash | Mar 16 | Apr 27 | May 4 | — | Aug 3 – Sep 7 | 85–110 |
| Cabbage | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 22 – Aug 17 | 60–100 |
| Calabash | Feb 23 | Apr 27 | May 4 | — | Jul 27 – Sep 21 | 80–120 |
| Carrots | — | Apr 6 | — | Aug 8 | Jun 8 – Jul 13 | 60–80 |
| Cauliflower | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Aug 17 | 55–100 |
| Celeriac | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Aug 3 – Sep 7 | 100–120 |
| Celery | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 13 – Sep 7 | 80–120 |
| Celtuce | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 22 – Aug 3 | 60–90 |
| Chard | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Aug 3 | 50–60 |
| Chickpeas | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 13 – Aug 24 | 80–110 |
| Chicory | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 22 – Aug 3 | 60–85 |
| Chinese Cabbage | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Jul 13 | 50–70 |
| Christmas Lima Beans | Feb 23 | Apr 27 | May 4 | — | Jul 27 – Aug 31 | 80–100 |
| Collard Greens | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Aug 17 | 55–75 |
| Corn | — | Apr 27 | — | — | Jun 29 – Aug 24 | 60–100 |
| Cowpeas | — | Apr 27 | — | — | Jun 29 – Aug 10 | 60–90 |
| Cress | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 4 – May 25 | 14–21 |
| Crookneck Squash | Mar 16 | Apr 27 | May 4 | — | Jun 22 – Jul 20 | 45–60 |
| Crosne | — | Apr 6 | — | Aug 8 | Sep 7 – Oct 19 | 150–200 |
| Cucumber | Mar 16 | Apr 27 | May 4 | — | Jun 29 – Aug 24 | 50–70 |
| Daikon | — | Apr 6 | — | Aug 8 | Jun 1 – Jun 29 | 50–70 |
| Delicata Squash | Mar 16 | Apr 27 | May 4 | — | Jul 27 – Aug 31 | 80–100 |
| Edamame | — | Apr 27 | — | — | Jul 13 – Aug 24 | 75–100 |
| Eggplant | Feb 9 | Apr 27 | May 4 | — | Jul 13 – Sep 14 | 65–85 |
| Endive | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 8 – Jul 13 | 45–65 |
| Escarole | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Jul 13 | 50–70 |
| Fava Beans | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 6 – Aug 17 | 75–100 |
| Fennel | Feb 23 | Apr 27 | May 4 | — | Jul 6 – Aug 17 | 60–90 |
| Garlic | — | — | — | Sep 5 | Dec 5 – Mar 20 | 90–240 |
| Green Beans | — | Apr 27 | — | — | Jun 22 – Aug 17 | 50–65 |
| Horseradish | — | — | May 4 | — | Sep 7 – Nov 16 | 120–180 |
| Hot Peppers | Feb 9 | Apr 27 | May 4 | — | Jul 13 – Oct 19 | 70–120 |
| Hubbard Squash | Mar 16 | Apr 27 | May 4 | — | Aug 17 – Sep 21 | 100–120 |
| Kabocha | Mar 16 | Apr 27 | May 4 | — | Aug 3 – Aug 31 | 85–100 |
| Kai Lan | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 8 – Jul 6 | 45–60 |
| Kale | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Aug 10 | 50–70 |
| Kidney Beans | — | Apr 27 | — | — | Jul 27 – Aug 31 | 85–110 |
| Kohlrabi | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 8 – Jul 13 | 45–65 |
| Komatsuna | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 25 – Jun 29 | 35–50 |
| Leeks | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 20 – Oct 5 | 90–150 |
| Lentils | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 13 – Aug 24 | 80–110 |
| Lettuce | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 25 – Aug 3 | 30–60 |
| Lima Beans | — | Apr 27 | — | — | Jun 29 – Aug 10 | 60–90 |
| Loofah | Feb 23 | Apr 27 | May 4 | — | Aug 17 – Oct 19 | 100–150 |
| Luffa | Feb 23 | Apr 27 | May 4 | — | Aug 3 – Oct 19 | 90–150 |
| Mache | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 1 – Jul 6 | 40–60 |
| Melon | Mar 16 | Apr 27 | May 4 | — | Jul 13 – Aug 31 | 70–100 |
| Microgreens | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Apr 27 – May 25 | 7–21 |
| Mitsuba | Mar 16 | Apr 6 | Apr 13 | Aug 8 | Jun 8 – Aug 3 | 50–70 |
| Mizuna | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 25 – Jun 22 | 30–45 |
| Mustard Greens | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 25 – Jul 27 | 30–50 |
| Napa Cabbage | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Jul 20 | 55–75 |
| New Zealand Spinach | Feb 23 | Apr 27 | May 4 | — | Jun 29 – Jul 27 | 55–70 |
| Okra | Feb 23 | Apr 27 | May 4 | — | Jun 29 – Aug 24 | 50–65 |
| Onion | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 20 – Sep 7 | 90–120 |
| Pac Choi | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 1 – Jun 29 | 40–55 |
| Parsnip | — | Apr 6 | — | Aug 8 | Jul 20 – Aug 31 | 100–130 |
| Patty Pan Squash | Mar 16 | Apr 27 | May 4 | — | Jun 22 – Jul 20 | 45–60 |
| Peas | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Aug 10 | 55–70 |
| Peppers | Feb 9 | Apr 27 | May 4 | — | Jul 6 – Sep 14 | 60–90 |
| Pole Beans | Feb 23 | Apr 27 | May 4 | — | Jun 29 – Aug 24 | 55–70 |
| Potatoes | Feb 23 | Apr 27 | May 4 | — | Jul 13 – Sep 21 | 70–120 |
| Pumpkin | Mar 16 | Apr 27 | May 4 | — | Aug 3 – Sep 21 | 85–120 |
| Purslane | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 1 – Jul 6 | 40–60 |
| Radicchio | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 22 – Jul 27 | 60–80 |
| Radish | — | Apr 6 | — | Aug 8 | May 4 – May 25 | 22–35 |
| Rhubarb | — | — | May 11 | — | — | 365–730 |
| Romanesco | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 6 – Aug 17 | 75–100 |
| Rutabaga | — | Apr 6 | — | Aug 8 | Jun 29 – Aug 3 | 80–100 |
| Salsify | — | Apr 6 | — | Aug 8 | Jul 20 – Aug 31 | 100–130 |
| Savoy Cabbage | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 29 – Aug 24 | 70–110 |
| Scallions | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Jul 13 | 50–70 |
| Scarlet Runner Beans | Feb 23 | Apr 27 | May 4 | — | Jul 6 – Aug 10 | 60–80 |
| Shallot | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jul 20 – Sep 7 | 90–120 |
| Shiso | Mar 2 | Apr 27 | May 4 | — | Jun 29 – Aug 24 | 50–70 |
| Snap Peas | Feb 23 | Apr 27 | May 4 | — | Jun 29 – Aug 24 | 55–70 |
| Snow Peas | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 15 – Aug 10 | 50–65 |
| Soybeans | — | Apr 27 | — | — | Jul 20 – Sep 14 | 80–120 |
| Spaghetti Squash | Mar 16 | Apr 27 | May 4 | — | Aug 3 – Aug 31 | 85–100 |
| Spinach | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 25 – Jul 27 | 35–50 |
| Squash (Summer) | Mar 16 | Apr 27 | May 4 | — | Jun 22 – Aug 24 | 45–65 |
| Squash (Winter) | Mar 16 | Apr 27 | May 4 | — | Jul 27 – Sep 21 | 80–120 |
| Sunchoke | — | — | May 4 | — | Aug 24 – Oct 19 | 110–150 |
| Sweet Corn | — | Apr 27 | — | — | Jun 29 – Aug 10 | 60–90 |
| Sweet Potatoes | Feb 23 | Apr 27 | May 4 | — | Aug 3 – Sep 21 | 90–120 |
| Tatsoi | Mar 16 | Apr 6 | Apr 20 | Aug 8 | May 25 – Jun 29 | 35–50 |
| Tomatillo | Feb 23 | Apr 27 | May 4 | — | Jul 6 – Sep 14 | 60–85 |
| Tomatoes | Feb 23 | Apr 27 | May 4 | — | Jul 6 – Sep 14 | 60–85 |
| Turnip | — | Apr 6 | — | Aug 8 | May 18 – Jun 22 | 40–60 |
| Watercress | Mar 16 | Apr 6 | Apr 20 | Aug 8 | Jun 1 – Jul 6 | 40–60 |
| Watermelon | Mar 16 | Apr 27 | May 4 | — | Jul 13 – Aug 31 | 70–100 |
| Wax Beans | — | Apr 27 | — | — | Jun 22 – Aug 17 | 50–65 |
| Winter Melon | Feb 23 | Apr 27 | May 4 | — | Aug 3 – Sep 21 | 90–120 |
| Yard Long Beans | Feb 23 | Apr 27 | May 4 | — | Jun 29 – Aug 10 | 55–80 |
| Zucchini | Mar 16 | Apr 27 | May 4 | — | Jun 22 – Aug 17 | 45–60 |
🍓 Fruits to Grow in Rolla
27 fruits matched to Zone 6b with planting dates calibrated for Rolla.
Show all 27 fruits with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 11 | — | Aug 10 – Nov 23 | 90–180 |
| Aronia | — | — | May 11 | — | — | 730–1095 |
| Blackberries | — | — | May 11 | — | — | 365–730 |
| Blueberries | — | — | May 11 | — | — | 730–1095 |
| Boysenberries | — | — | May 11 | — | — | 365–730 |
| Cantaloupe | — | — | May 11 | — | Jul 20 – Aug 24 | 70–90 |
| Che Fruit | — | — | May 11 | — | — | 1095–1825 |
| Cranberries | — | — | May 11 | — | — | 730–1095 |
| Currants | — | — | May 11 | — | — | 730–1095 |
| Elderberries | — | — | May 11 | — | — | 730–1095 |
| Goji Berries | — | — | May 11 | — | — | 730–1095 |
| Gooseberries | — | — | May 11 | — | — | 730–1095 |
| Grapes | — | — | May 11 | — | — | 730–1095 |
| Ground Cherry | — | — | May 11 | — | Jul 20 – Sep 14 | 65–80 |
| Hardy Kiwi | — | — | May 11 | — | — | 1095–1825 |
| Haskaps | — | — | May 11 | — | — | 730–1095 |
| Honeydew | — | — | May 11 | — | Aug 3 – Sep 14 | 80–110 |
| Jostaberry | — | — | May 11 | — | — | 730–1095 |
| Lingonberries | — | — | May 11 | — | — | 730–1095 |
| Medlar | — | — | May 11 | — | — | 1095–1825 |
| Mulberries | — | — | May 11 | — | — | 730–1825 |
| Pawpaw | — | — | May 11 | — | — | 1095–2555 |
| Persimmon | — | — | May 11 | — | — | 1095–2555 |
| Quince | — | — | May 11 | — | — | 1095–1825 |
| Raspberries | — | — | May 11 | — | — | 365–730 |
| Serviceberries | — | — | May 11 | — | — | 730–1095 |
| Strawberries | — | — | May 11 | — | Aug 10 – Nov 23 | 90–365 |
🌿 Herbs to Grow in Rolla
35 herbs matched to Zone 6b with planting dates calibrated for Rolla.
Show all 35 herbs with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Mar 16 | Apr 6 | Apr 13 | Aug 8 | — | 365–730 |
| Anise | Mar 16 | Apr 6 | Apr 13 | Aug 8 | Jul 13 – Sep 28 | 90–120 |
| Basil | Mar 2 | Apr 27 | May 4 | — | Jun 29 – Aug 31 | 50–75 |
| Bee Balm | — | — | Apr 27 | — | Jul 27 – Oct 12 | 90–120 |
| Borage | Mar 16 | Apr 6 | Apr 13 | Aug 8 | Jun 8 – Jul 27 | 50–60 |
| Caraway | Mar 16 | Apr 6 | Apr 13 | Aug 8 | — | 365–450 |
| Catnip | — | — | Apr 27 | — | Jun 29 – Aug 31 | 60–80 |
| Chamomile | Mar 16 | Apr 6 | Apr 13 | Aug 8 | Jun 15 – Aug 24 | 60–90 |
| Chervil | Mar 16 | Apr 6 | Apr 13 | Aug 8 | May 25 – Jul 27 | 40–60 |
| Chives | — | — | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Cilantro | Mar 16 | Apr 6 | Apr 13 | Aug 8 | May 25 – Jul 27 | 40–60 |
| Comfrey | — | — | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Cumin | Mar 16 | Apr 6 | Apr 13 | Aug 8 | Jul 27 – Sep 28 | 100–120 |
| Dill | Mar 16 | Apr 6 | Apr 13 | Aug 8 | May 25 – Jul 27 | 40–60 |
| Epazote | Mar 2 | Apr 27 | May 4 | — | Jun 22 – Aug 17 | 45–60 |
| Fennel (herb) | Mar 16 | Apr 6 | Apr 13 | Aug 8 | Jun 15 – Aug 24 | 60–90 |
| Feverfew | — | — | Apr 27 | — | Jul 27 – Oct 12 | 90–120 |
| Garlic Chives | — | — | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Horehound | — | — | Apr 27 | — | Jul 13 – Sep 7 | 75–90 |
| Hyssop | — | — | Apr 27 | — | Jul 6 – Sep 7 | 70–90 |
| Lemon Balm | — | — | Apr 27 | — | Jun 29 – Aug 17 | 60–70 |
| Lemon Thyme | — | — | Apr 27 | — | Jul 6 – Sep 7 | 70–90 |
| Lovage | — | — | Apr 27 | — | Jul 6 – Sep 7 | 70–90 |
| Marjoram | — | — | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Mint | — | — | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Oregano | — | — | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Parsley | Mar 16 | Apr 6 | Apr 13 | Aug 8 | Jun 15 – Aug 17 | 60–80 |
| Rue | — | — | Apr 27 | — | Jul 6 – Sep 7 | 70–90 |
| Sage | — | — | Apr 27 | — | Jul 13 – Sep 7 | 75–90 |
| Savory | — | — | Apr 27 | — | Jun 22 – Aug 17 | 50–70 |
| Sorrel | Mar 16 | Apr 6 | Apr 13 | Aug 8 | May 25 – Jul 27 | 40–60 |
| Tarragon | — | — | Apr 27 | — | Jun 29 – Sep 7 | 60–90 |
| Thai Basil | Mar 2 | Apr 27 | May 4 | — | Jun 29 – Aug 31 | 50–75 |
| Thyme | — | — | Apr 27 | — | Jul 6 – Sep 7 | 70–90 |
| Valerian | — | — | Apr 27 | — | Aug 31 – Nov 9 | 120–180 |
🌸 Flowers to Grow in Rolla
53 flowers matched to Zone 6b with planting dates calibrated for Rolla.
Show all 53 flowers with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 2 | Apr 20 | Apr 20 | — | Jun 15 – Sep 28 | 60–75 |
| Alliums | — | — | — | Sep 5 | Oct 3 – Oct 31 | 28–42 |
| Anemones | Mar 23 | — | Apr 20 | — | May 18 – Jun 15 | 90–120 |
| Astilbe | Feb 16 | — | Apr 27 | — | Jul 6 – Sep 14 | 70–100 |
| Bachelor's Button | Mar 9 | Mar 23 | Apr 20 | Sep 5 | Jun 22 – Sep 14 | 60–90 |
| Begonias | Feb 9 | — | Apr 27 | — | Jul 6 – Oct 12 | 70–90 |
| Black-eyed Susan | Feb 16 | Apr 20 | Apr 27 | — | Jul 13 – Nov 2 | 60–80 |
| Bleeding Hearts | Feb 16 | — | Apr 27 | — | Jun 22 – Jul 27 | 60–90 |
| Calendula | Mar 9 | Mar 23 | Apr 20 | — | Jun 8 – Sep 14 | 50–70 |
| California Poppy | — | Mar 23 | — | — | Jun 1 – Jul 27 | 60–90 |
| Celosia | Mar 16 | Apr 27 | Apr 27 | — | Jun 29 – Oct 19 | 60–90 |
| Columbine | Feb 16 | Apr 27 | Apr 27 | — | Jun 22 – Jul 27 | 70–100 |
| Coreopsis | Feb 16 | Apr 20 | Apr 27 | — | Jul 6 – Nov 2 | 60–80 |
| Cosmos | Mar 23 | Apr 20 | Apr 20 | — | Jun 29 – Oct 12 | 60–90 |
| Crocus | — | — | — | Sep 5 | Jul 25 – Aug 15 | 10–20 |
| Daffodils | — | — | — | Sep 5 | Aug 1 – Aug 22 | 20–40 |
| Dahlias | Mar 23 | Apr 27 | Apr 27 | — | Jul 13 – Nov 2 | 70–120 |
| Daylily | Feb 16 | — | Apr 27 | — | Jul 13 – Nov 2 | 60–90 |
| Dianthus | Feb 23 | Mar 23 | Mar 30 | — | May 18 – Aug 17 | 60–80 |
| Echinacea (Purple Coneflower) | Feb 16 | Apr 27 | Apr 27 | — | Jul 13 – Nov 2 | 70–90 |
| Foxglove | Feb 16 | Apr 27 | Apr 27 | — | Jun 22 – Jul 27 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 2 | Apr 27 | Apr 27 | — | Jul 6 – Nov 9 | 70–100 |
| Geraniums | Feb 9 | — | Apr 27 | — | Jul 6 – Oct 12 | 70–100 |
| Gladiolus | — | Apr 20 | Apr 20 | — | Jul 6 – Oct 26 | 70–100 |
| Hostas | Feb 9 | — | Apr 27 | — | Jul 13 – Nov 2 | 60–90 |
| Hyacinths | — | — | — | Sep 5 | Aug 22 – Sep 12 | 14–28 |
| Hydrangeas | Feb 9 | — | Apr 27 | — | Jul 6 – Oct 19 | 90–150 |
| Impatiens | Feb 23 | — | Apr 27 | — | Jul 6 – Oct 19 | 60–75 |
| Irises | — | Division | Apr 27 | — | Jun 22 – Jul 20 | 60–100 |
| Larkspur | — | Mar 23 | — | — | Jun 1 – Jul 27 | 60–90 |
| Lavender | Feb 9 | — | May 4 | — | Jul 13 – Sep 7 | 90–120 |
| Lilies | — | Division | Apr 27 | — | Jul 6 – Oct 12 | 70–120 |
| Lobelia | Feb 16 | — | Apr 6 | — | Jun 1 – Aug 24 | 70–80 |
| Lupine | Feb 16 | Apr 27 | Apr 27 | — | Jun 22 – Jul 27 | 75–100 |
| Marigolds | Mar 9 | Apr 20 | Apr 20 | — | Jun 15 – Sep 21 | 50–70 |
| Nasturtium | Mar 23 | Apr 20 | Apr 20 | — | Jun 15 – Oct 12 | 55–65 |
| Pansy | Feb 9 | — | Apr 20 | Aug 22 | Jun 15 – Aug 24 | 70–90 |
| Peonies | — | Division | Apr 27 | — | Jun 29 – Aug 3 | 90–120 |
| Petunia | Feb 23 | — | Apr 27 | — | Jul 6 – Oct 19 | 70–90 |
| Phlox | Feb 16 | Apr 27 | Apr 27 | — | Jul 6 – Sep 28 | 80–110 |
| Portulaca | Mar 16 | Apr 27 | Apr 27 | — | Jun 15 – Oct 5 | 50–70 |
| Ranunculus | Mar 9 | — | Apr 20 | — | May 25 – Jun 22 | 90–120 |
| Roses | Feb 9 | — | Apr 27 | — | Jul 6 – Nov 2 | 90–180 |
| Salvia | Feb 16 | — | Apr 20 | — | Jun 29 – Oct 12 | 70–90 |
| Sedum (Stonecrop) | Feb 16 | — | Apr 27 | — | Aug 17 – Nov 9 | 60–90 |
| Snapdragon | Feb 9 | Mar 30 | Apr 20 | — | Jun 29 – Sep 14 | 70–100 |
| Sunflower | Mar 30 | Apr 20 | Apr 20 | — | Jul 13 – Oct 12 | 70–100 |
| Sweet Alyssum | Mar 9 | Mar 30 | Apr 20 | — | Jun 1 – Aug 17 | 45–60 |
| Sweet Pea | Mar 9 | Mar 16 | Apr 20 | — | Jul 6 – Sep 14 | 65–85 |
| Tulips | — | — | — | Sep 12 | Aug 22 – Sep 19 | 15–30 |
| Vinca (Annual) | Feb 9 | — | Apr 27 | — | Jul 6 – Oct 19 | 70–90 |
| Yarrow | Feb 16 | Apr 20 | Apr 27 | — | Jul 6 – Nov 2 | 60–90 |
| Zinnia | Mar 23 | Apr 20 | Apr 20 | — | Jun 29 – Oct 5 | 60–70 |
Monthly Planting Guide for Rolla
ZIP Codes in Rolla
Click any ZIP to see its specific frost, soil, and climate measurements (some ZIPs differ noticeably from the town aggregate):
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Morton County.
Your Morton County Garden Planner — Free
A 22-page printable planner built for Morton County (Zone 6b). 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