When to Plant Peppers, 2–3 Weeks After Your Last Frost

On this page

1. 1How do you work out your planting date?
2. 2When should different regions plant out?
3. 3Is your average last frost date a coin flip?
4. 4How much lead time do superhots need?
5. 5How do you know it is warm enough?
6. 6When should you harden off seedlings?
7. 7Should you buy transplants or start from seed?
8. 8How many frost-free days does your pepper need?
9. 9What happens if you plant late?
10. 10How old should transplants be on planting day?
11. 11Can you plant peppers earlier than that?
12. 12What if frost comes after you plant?
13. 13What if you live where frost is rare?
14. 14Your planting-out day
15. 15Sources

How do you work out your planting date?

Find your average last spring frost and count from it. Seeds go in 8 to 10 weeks before that date¹, and plants go outside 2 to 3 weeks after it, once the soil has reached at least 60°F². Everything else in your season hangs off those two steps.

1. 8–10 weeks before the frost

   Sow seeds indoors. Some types and cultivars need 12 weeks.¹

2. 1–4 weeks after sowing

   Seedlings come up in 8–25 days at a soil temperature of 70–85°F.²

3. About 2 weeks before planting out

   Harden off: a couple of hours of sun in a sheltered spot, more each day over a week or two (Penn State starts 7–10 days ahead). Bring plants in if nights drop below 55°F.²³

4. 2–3 weeks after the frost

   Transplant once the soil is at least 60°F and night lows stay above 50°F.²³

5. 70–85 days after planting out

   First harvest for most sweet and hot types.¹

6. 90–120 days after planting out

   Habanero types ripen.¹

Sources differ on the indoor stretch, so you have some choice. UMN Extension counts about eight weeks back from the day you plant out rather than from the frost³, and UC IPM gives 4 to 6 weeks before the frost⁴. The 8–10 week figure from UMD and Penn State gives you the bigger, sturdier plant, and Utah State also grows its transplants for 8 to 10 weeks⁵. The seed starting calendar counts those weeks back for you.

Your USDA zone does not give you this date. A zone measures the coldest winter night, not the day of the last spring frost; the pepper growing zones hub explains the difference, and your county extension office has the local frost date.

What does that look like on a real calendar?

Here are the same offsets worked for two sample frost dates, an April 20 frost and a May 25 frost. Swap in your own date and count the same way.

Pepper dates worked from two sample last-frost dates

Step	Offset	Last frost April 20	Last frost May 25
Sow, slow types1	12 weeks before	January 26	March 2
Sow, most types1	10–8 weeks before	February 9–23	March 16–30
Plant out2	2–3 weeks after	May 4–11	June 8–15
First harvest, most types1	70–85 days after planting	July 13 – August 4	August 17 – September 8
Ripe habanero types1	90–120 days after planting	August 2 – September 8	September 6 – October 13

The late frost pushes every date back five weeks. With a late frost, the slow peppers need warm weather well into October, so start them first and give them the sunniest spot. UMN Extension notes that pods ripening in cool, cloudy weather do not taste as good³. If your summers run that short, the short-season varieties list picks peppers that finish sooner.

When should different regions plant out?

Each state's extension service publishes its own window, and they line up with the frost-date rule you already have. Here are the ones read for this guide, so you can check yours against a neighbor.

Published pepper planting windows by region

Region	Plant out
South Carolina Piedmont6	May 1 – June 30
South Carolina coast6	April 1 – May 15; fall planting July 10 – August 10
California north and north coast4	May
California south coast4	April – May
California interior valleys4	March – June
California desert valleys4	March
South Florida7	August – February

UC IPM calls its dates approximate, because the climate can vary a lot inside one region, and suggests you check with your local Master Gardener program⁴. Clemson does not recommend fall planting in the Piedmont at all⁶, so a second crop only works where the season runs long on both ends.

New Mexico State gives no calendar dates in its garden guide; it waits until after the last frost and until the soil warms⁸. That is the same rule this page uses, stated without the numbers.

Is your average last frost date a coin flip?

Close to it. NOAA's map shows the date after which freezing becomes less likely than not, a 50 percent line, based on the 1991-2020 normals⁹. Half of all years still see a freeze after that date, so the frost date you looked up is a starting point, not a promise.

The same normals also give the dates after which the chance of a freeze falls below 40, 30, 20 and 10 percent⁹. Climate.gov uses Boulder, Colorado as its example: the 50 percent date is May 6, and a gardener who wants only a 10 percent risk waits until after May 18⁹. That is 12 days of difference in one town.

1. 1

   Look up your own 50 percent date

   Open the Annual/Seasonal Normals page at NOAA's NCEI, choose the freeze-date data, and find your nearest station.⁹

2. 2

   Find the 10 percent date next to it

   It always falls later. The gap tells you how risky early planting is where you live.⁹

3. 3

   Add the pepper buffer

   Penn State plants out 2 to 3 weeks after the last frost, with the soil at 60°F or warmer.²

4. 4

   Check the forecast the week you plant

   NOAA suggests the 6 to 10 day outlook and your local forecast, because a normal says nothing about this year.⁹

Run the Boulder numbers and the buffer does the work for you. May 6 plus 2 weeks is May 20, already past the 10 percent date of May 18. That is our arithmetic on two published figures, but it shows why the 2 to 3 week wait in the timeline above is more than caution: it moves your planting date past the unlucky tail of the frost odds. In a town where the 10 percent date sits more than 3 weeks after the 50 percent date, give the soil thermometer more say than the calendar.

How much lead time do superhots need?

About 12 weeks indoors, the long end of the range. UMD says some pepper types need 12 weeks before the frost¹, and the slow Capsicum chinense peppers, habaneros and superhots, also take 90 to 120 days from transplant to ripe¹. Your superhot gets a head start on both ends or it runs out of summer.

With an April 20 frost, that means you sow on January 26 and plant out with everything else in early May. The Carolina Reaper plan works the full season for one of them, including the seed tray that can take up to four weeks to show.

How do you know it is warm enough?

The calendar gets you close; your soil and the night air decide the day. Run these checks in order on the morning you plan to plant.

1. 2–3 weeks past your frost date?Penn State's transplant window
2. yes
   Soil 60°F or warmer?Read a soil thermometer at planting depth
3. yes
   Night lows above 50°F?Check the 10-day forecast
4. yes
   Plants hardened off?A week or two outside, flowers pinched off
5. yes
   Plant out todayLate afternoon or a cloudy day
6. Wait a few daysBelow 65°F soil, UMD says plants just sit there

^{4 sources}Sources for this line1. University of Maryland Extension2. PlantVillage, Penn State University3. University of Minnesota Extension5. Utah State University Extension

A soil thermometer settles it in a minute. A warm afternoon says little about the soil a few inches down, which is why Penn State and UMD set planting day by soil temperature. Push the probe in about 4 inches in the morning, when the soil runs coolest, and you get the number that matters.

When should you harden off seedlings?

Start about two weeks before your planting date, while your plants still live indoors. UMN Extension cuts back water once plants are 4 to 5 inches tall and 6 to 8 weeks old, then moves them outside a little more each day over a week or two³; Penn State starts 7 to 10 days ahead².

1. 1

   Ease off the water

   Once plants are 4–5 inches tall and 6–8 weeks old, water a little less.³

2. 2

   Start with a couple of hours

   Set the tray in a sheltered spot outside for a couple of hours of sun on the first day.³

3. 3

   Add time each day

   Leave the plants out longer each day over a week or two, until they stay out all day.²³

4. 4

   Bring them in on cold nights

   If the night drops below 55°F, the tray comes back inside.³

The hardening off guide covers wind, sun and what a scorched leaf looks like. If you skip this week, plants that have only known a windowsill or grow light go into full sun and wind at once, and they stall while they adjust.

Should you buy transplants or start from seed?

Either works if you time it to your frost date. The compare below shows what each one asks of you.

Sowing straight into the garden is the third option, and the slowest. UC IPM puts the ideal soil for direct seeding at 77°F or above⁴, which most northern gardens reach only in early summer, so transplants win for you in most places.

How many frost-free days does your pepper need?

Count the days between planting out and your first fall frost, then compare them with the days your pepper needs. Maryland gives most sweet and hot types 70 to 85 days from transplanting to first harvest, a bell pepper 70 to 80 days to mature green plus 2 to 3 weeks more to ripen, and habanero types 90 to 120 days¹. Penn State puts planting out 2 to 3 weeks after the last frost².

Days left after planting out, against days each pepper needs (frost-free season = days from last to first frost)

Frost-free season	Days left after planting out	Most types	Bells to ripe	Habanero types
120 days	99–106	Enough: 70–85	Close: 84–101	Short: 90–120
150 days	129–136	Enough: 70–85	Enough: 84–101	Enough: 90–120
180 days	159–166	Room for a second picking	Enough: 84–101	Enough: 90–120

A 120-day season is where the choices start to matter. You pick the pepper that fits, start a superhot indoors a few weeks earlier than the others, or put the plant in a pot you can move to a warm wall. Cool weather lengthens every figure, and UMN notes that pods ripening in cool, cloudy weather do not taste as good³. The short-season varieties page lists peppers built for the 120-day garden, and the fruit-set guide shows how to count back from your first fall frost.

What happens if you plant late?

You lose pods at the end of the season, not at the start. Maryland gives most sweet and hot types 70 to 85 days from transplanting to the first harvest¹, so you can count forward from any planting date to see what you get.

Take Clemson's last spring date for the South Carolina Piedmont, June 30⁶. Add 70 to 85 days and your first peppers come between September 8 and September 23. That works for a jalapeño, but a habanero type at 90 to 120 days¹ would ripen from late September into late October, and only a long, warm fall gets it there.

A fall crop runs the same sum. Clemson plants coastal fall peppers from July 10 to August 10⁶; 70 to 85 days later puts your harvest between mid-September and early November, while the coast stays warm. Inland, where Clemson does not recommend fall planting at all, the first cold nights arrive before the pods.

How old should transplants be on planting day?

Six to ten weeks for most home-grown plants, depending on the guide you follow. Utah State grows transplants for 8 to 10 weeks, until they have 6 to 9 mature leaves⁵; Clemson sets out 6 to 8 week-old plants⁶; New Mexico State needs 6 to 8 weeks from seeding to transplant size⁸.

UC IPM is the outlier. It uses plants about 3 weeks old with 4 to 6 true leaves, wider than tall and slightly hardened off⁴, and starts them only 4 to 6 weeks before the frost. In a warm California spring that works; in a short northern season, the older, bigger plant gives you a head start you need.

Can you plant peppers earlier than that?

A little, with cover. Utah State Extension says black plastic mulch and row covers let you set plants out several weeks before the last frost date⁵, and plastic warms the soil while it keeps weeds down³.

Early cover gives you its own risk. High temperatures during flowering and early fruit growth can make plants drop flowers and young fruit, so Utah State says to take covers off once the weather settles⁵.

What if frost comes after you plant?

Cover your plants that evening. Here is what the extension guides do at each end of the season.

• A cold night in late spring. Utah State protects young plants from cold air with hotcaps, tunnels or fabric row covers⁵. Peppers in pots go back inside, the same rule UMN uses for hardening off below 55°F³.
• A run of cool nights after planting. Nothing is wrong with your plants if they sit still for a week. UMD says peppers set into cool soil just sit there¹; they pick up once the soil warms.
• A killing frost in fall. UMD pulls whole plants just before a killing frost and hangs them upside down in a warm place so the last pods ripen¹.

The frost and cold guide covers how cold peppers can take and what frost damage looks like.

What if you live where frost is rare?

Then the summer heat sets your dates, not the frost, and you plant for the mild months. In south Florida, UF/IFAS gives a pepper planting window from August through February⁷, which keeps flowering away from the hottest months.

The heat limits explain the window. UC IPM says days above 100°F reduce pollination, fruit set and yield⁴, so in a hot climate you plant so the plants flower in the mild part of the year. The sun and heat guide covers shade and the hours peppers need.

Your planting-out day

Pick a calm, cloudy day or a late afternoon, and follow UMN Extension's order³:

1. 1

   Water the plants first

   Soak the seedlings well before you take them out of their pots.³

2. 2

   Dig a hole the size of the root ball

   Space the holes about 18 inches apart in rows 30 to 36 inches apart.³

3. 3

   Set the plant at its old depth

   Keep the stem at the soil line where it sat in the pot, and keep the roots undisturbed. Bury the whole rim of a peat pot so it cannot wick the root ball dry.³

4. 4

   Firm and water

   Press the soil around the roots and water the transplant in.³

5. 5

   Shade a summer planting

   If you plant out in hot weather, shade the plants at midday for the first week or cover them with floating row cover.⁴

The next jobs are feeding and spacing. The gaps for beds and rows come from pepper plant spacing, and the feeds that go in 4 and 8 weeks later from feeding peppers.