Peppers are in the same family as tomatoes and follow a similar playbook, but they are even less forgiving of cold. A pepper transplanted into cold soil will stall for weeks while a well-timed transplant surges ahead. Get the timing and the warmth right, and peppers are otherwise one of the least demanding fruiting vegetables you can grow.
When to plant peppers
Cold is the enemy at every stage. Peppers do not just dislike frost; they lose weeks of growth when nighttime temperatures drop below 55 degrees F, even without any freeze damage. Soil temperature matters just as much: below 60 degrees F, peppers barely grow.
Wait to transplant until:
- All frost risk has passed in your area.
- Nighttime temperatures are reliably above 55 degrees F.
- Soil temperature at 4-inch depth is at least 65 degrees F.
If you are starting from seed indoors (which is highly recommended, given their slow germination and long season), sow 8 to 10 weeks before your last frost date. Some hot pepper varieties need 12 weeks.
For seed-starting technique, see how to start seeds indoors. Pepper seeds germinate most reliably with bottom heat (soil temperature of 80 to 85 degrees F), so a seedling heat mat is genuinely useful here.
After germination, move transplants through a proper hardening off period before they go outside. Read our hardening off guide to avoid shocking transplants with sudden sun and wind exposure.
Where to plant: sun and soil
Sun: Peppers need at least 8 hours of direct sun per day. They will grow in 6 hours but produce fewer fruit and become more prone to disease, including the bacterial spot that strips their foliage.
Soil: Peppers prefer slightly sandy, well-draining, organic-rich soil with a pH between 6.0 and 6.8. They dislike waterlogged roots. Before planting, work 2 to 3 inches of compost into the top 6 inches of soil. Good organic matter supports even moisture retention, which directly reduces the risk of blossom end rot.
Raised beds with well-amended soil are ideal for peppers since you can build exactly the warm, loose, well-draining conditions they prefer. See raised bed gardening for beginners for how to set one up.
Spacing and staking
Space pepper transplants 18 inches apart within rows, with rows 24 to 30 inches apart. This gives each plant good airflow, which matters for disease prevention.
Most bell peppers and medium-sized sweet peppers benefit from a simple stake or a small wire cage. They do not get nearly as tall as tomatoes, but heavy fruit loads can tip plants or break branches in wind. A single stake and a few ties is usually all they need.
Use our spacing calculator to see how many plants fit in your raised bed at 18-inch spacing.
Watering and feeding
Peppers want consistent, deep watering. The target is 1 to 2 inches per week delivered to the root zone, not onto the foliage. Wet foliage encourages bacterial spot, which causes leaf drop and eventually exposes fruit to sunscald. A soaker hose or drip line is a cleaner solution than overhead watering.
Inconsistent moisture (alternating dry and soggy) causes blossom end rot, the same calcium-transport disorder that affects tomatoes. Keep watering even throughout the season, and mulch around plants to buffer wet-dry swings.
Feeding: Work a balanced slow-release vegetable fertilizer into the planting hole at transplant time. Once you see the first few flowers, switch to a light feeding every 3 to 4 weeks that is lower in nitrogen. High nitrogen after flowering pushes leafy growth instead of fruit and can worsen calcium availability.
Common problems to watch for
Peppers have a shorter problem list than tomatoes, but the few issues they face are worth knowing.
Diseases and disorders:
- Blossom end rot: Dark, leathery sunken patches on the bottom of the fruit. Caused by inconsistent watering and poor calcium transport. Correct watering; the next fruit set is usually fine.
- Bacterial spot: Water-soaked spots on leaves and fruit that turn tan or brown, often with yellow halos. Leaves drop prematurely, leaving fruit exposed to sun. Avoid overhead watering; remove heavily infected foliage; choose resistant varieties where available.
- Sunscald: White or tan papery patches on the side of the fruit facing the sun. Often follows bacterial spot defoliation. Protect fruit with floating row cover or shade cloth during heat waves, and manage bacterial spot early to keep foliage intact.
Pests:
- Aphids: Small soft-bodied insects clustered on new growth and undersides of leaves. They are more common on peppers stressed by excessive nitrogen or grown near other aphid-susceptible crops. A strong stream of water dislodges them; insecticidal soap handles heavier infestations.
Harvesting peppers
All pepper varieties start green and ripen to their final color (red, orange, yellow, purple, brown, depending on the variety) over time. You can harvest at any stage.
- Green: Harvest any time the fruit has reached full size. Flavor is sharper and slightly bitter compared to ripe fruit.
- Ripe color: Leave on the plant an additional 2 to 4 weeks past full size for full sweetness, thicker walls, and maximum vitamin C content. Most peppers ripen to red at full maturity; variety labels will specify.
- Hot peppers: Harvest at the ripe color stage for maximum heat and full flavor development.
Harvest by cutting the stem with clean scissors or pruners rather than pulling, which can snap branches. Frequent harvesting keeps the plant productive throughout the season.
Growing peppers in containers
Peppers are well suited to containers and perform well in pots as small as 5 gallons for compact varieties (like dwarf sweet peppers) and 10 to 15 gallons for full-sized bell peppers. Containers must be placed in full sun and watered more frequently than in-ground beds. Plastic or fabric pots retain heat better than terracotta in cool climates, which helps keep the root zone warm.
See our container gardening guide for soil, watering, and sizing details.
For related crops, tomatoes follow a very similar growing profile and make excellent bed companions. If you are planning a companion planting strategy, our companion planting guide covers good and bad pairings for peppers.
When should I transplant peppers outside?
After your last frost date, once nighttime temperatures stay above 55 degrees F and soil temperature is at least 65 degrees F. Peppers planted into cold soil stall for weeks. Use our frost dates tool and planting calendar to get your specific transplant window by ZIP code.
How far apart should pepper plants be spaced?
Space peppers 18 inches apart within rows, with rows 24 to 30 inches apart. Crowded plants have poor airflow, which increases disease pressure and reduces fruit set. Our spacing calculator can map this out for your bed size.
Why are my pepper plants not setting fruit?
The most common cause is temperature. Peppers drop blossoms and fail to set fruit when daytime temperatures exceed 90 degrees F or nights fall below 55 degrees F. Both are self-correcting when temperatures moderate. Overly high nitrogen fertilizer can also push leafy growth at the expense of fruiting.
Why do my peppers have dark spots on the bottom of the fruit?
That is blossom end rot, caused by calcium deficiency at the fruit tip driven by inconsistent soil moisture. It is not a disease you can spray away. Water evenly and consistently, mulch around the base to retain moisture, and avoid high-nitrogen fertilizers. The next fruit set usually comes through clean once watering is corrected.
Can I grow peppers in pots?
Yes. Peppers grow well in containers of at least 5 gallons for compact varieties and 10 to 15 gallons for full-sized bell types. Use a rich, well-draining potting mix, place in full sun, and water more frequently than in-ground plants. Containers also let you move plants to a sheltered spot if a late frost threatens.