Why Are My Peppers Not Turning Red?
Most peppers are not turning red because they are still maturing, or because the variety ripens to another color. Leave mature fruit on a healthy plant longer, since many red-ripe peppers need several weeks after reaching full green size to change color.
Check the seed packet, plant tag, or variety description first. Some peppers mature yellow, orange, purple, brown, or remain green, while others pass through an intermediate color before becoming red. A pepper at its final green size is mature-green, not necessarily fully ripe.
Warm weather and adequate time are the main requirements for color change. Depending on the variety and conditions, fruit may need two to four weeks after it reaches full size before red color appears. Late-season fruit can take longer as day length shortens and nighttime temperatures cool.
Peppers grow and ripen best with at least six to eight hours of direct sun. In consistently hot conditions, roughly above 90°F during the day or 75°F at night, plants may pause flowering or ripen more slowly. Temporary shade from nearby crops, dense foliage, or structures can also delay color development.
Avoid heavy nitrogen feeding after plants have begun setting fruit. Excess nitrogen favors leafy growth over fruit production and can delay maturity. Use a soil test to guide fertility, and keep soil evenly moist rather than alternating between drought and saturation.
Pick damaged, diseased, or severely misshapen fruit so the plant can direct resources to sound peppers. If frost is approaching, harvest full-sized mature-green fruit before temperatures fall near 50°F for extended periods. They may color somewhat indoors at room temperature, but flavor and color development are usually best on the plant.
At the end of the season, remove new flowers and tiny fruit that have no realistic chance of maturing before cold weather. This does not make existing peppers turn red overnight, but it can focus the plant on larger fruit already present. Protect plants from brief cool nights with a cover that does not press against foliage, removing it during warm days.
Frequently asked questions
How long does it take a green pepper to turn red?
Many varieties need two to four weeks after reaching their full green size, though weather and variety can extend that period.
Can I pick green peppers and wait for them to turn red indoors?
Full-sized mature-green peppers may develop some color indoors at room temperature, but the most complete ripening usually occurs on the plant.
Does picking green peppers make the remaining peppers turn red faster?
It can reduce the plant's fruit load, but warmth, sunlight, variety, and the maturity of each remaining pepper are more important.
General guidance for US home gardens. Conditions vary by region and season; check with your local Cooperative Extension office for site-specific advice. Page updated Aug 4, 2026.