Capsicum annuum 'Jalapeño'
vegetableThe jalapeno is the most widely grown hot pepper in North America, a medium-heat chile rated about 2,500 to 8,000 Scoville units with thick crisp walls and a grassy, vegetal bite. Picked green it is the workhorse of salsas, nachos, poppers, and pickling; left to ripen red on the plant it grows sweeter and a touch hotter, and smoke-dried red jalapenos become chipotles. The compact, productive plants suit gardens and containers alike and set heavy loads of fruit over a long warm season, making one or two plants plenty for most households.
Sun
full sun
Water
Every 3 days
Harvest
~75 days
Difficulty
easy
Lifecycle
annual
One season, then done
Spacing
18-24 in. apart
Planting Depth
1/4 in.
Soil pH
6.0-6.8
Soil Type
Rich, well-draining
Hardiness Zones
Zones 4 – 11
Grown as an annual — this range is its winter hardiness, but you can grow it for a single season in any zone.
When to Fertilize
At transplant, then lightly every 4 weeks once fruit sets
Fertilizer
Balanced 5-10-10, low nitrogen
Start seed indoors about 8 weeks before the last frost, keeping the mix at 80 to 90F until it sprouts, then growing on near 70F under bright light. Peppers are heat-lovers, so harden off and transplant only after nights stay above 50 to 55F, setting plants a quarter inch deeper than they grew, 18 inches apart in rows 30 to 36 inches, in full sun and soil of pH 6.5 to 7. Water deeply to about an inch a week and avoid overhead sprinkling. Feed lightly: too much nitrogen yields leafy plants slow to fruit. Stake or cage plants once they are heavy with fruit. Steady moisture prevents blossom-end rot, and very hot days can cause temporary blossom drop.
Start seeds indoors
Feb 18
Transplant outdoors
Apr 29
Projected first harvest
Jul 13
Good neighbors that attract beneficial insects or deter pests
Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide
Draw in hoverflies with sweet alyssum; rinse colonies off with water early
Float row cover over young transplants until well established
Water evenly and ensure adequate calcium; mulch to buffer soil moisture
Green jalapenos are ready about 70 to 75 days from transplant, at full size with firm, glossy walls; for a sweeter, hotter pepper leave them on the plant another couple of weeks until they turn red. Cut fruit off with sharp shears rather than pulling, which tears the brittle stems. Harvest regularly to keep the plant setting. The fine corking lines that appear on the skin are a sign of full maturity and extra heat, not damage. When cutting hot peppers, wear gloves and keep your hands away from your eyes, as the capsaicin oil lingers.
Jalapenos are exceptionally high in vitamin C, ounce for ounce more than a bell pepper, and supply vitamin B6, vitamin K, and beta-carotene. Their heat comes from capsaicin, which research links to reduced inflammation, a modest metabolism boost, and pain-relief uses. They are very low in calories, so they pack flavor and nutrients into almost no energy; much of the vitamin C is preserved when they are eaten raw or only lightly cooked.
For educational and informational purposes only — HomeSown is not medical, health, or other professional advice. Always positively identify any plant before handling or eating it; some plants, and some parts of otherwise-edible plants, are toxic. Consult a qualified professional before consuming or otherwise using any plant, especially if you are pregnant, nursing, taking medication, or have a health condition.