Growing Jalapeno Peppers

Growing jalapeno peppers is a popular choice for hot peppers in recipes and in the garden. A native of Mexico, with US production centered in New Mexico and Texas, jalapeno peppers are fairly easy to grow and can really bring the heat to many dishes.

Jalapeno Peppers In Your Garden

Variety: Jalapeno Capsicum annuum
Zones: Grown as an annual
Soil Type: Average, well-drained soil
Soil pH: 6.5 to 7.0
Sunlight: Full sun
Availability: Sold as seeds or nursery grown starter plants. When buying plants look for healthy foliage-avoid yellowed or wilted plants.
When to plant: Seeds may be started indoors six to eight weeks before last frost. Live plants should not be placed outdoors until nighttime temperatures are consistently above 55 degrees (F).

Planting Method

Seeds: Plant jalapeno seeds in individual peat pots that can be buried directly in the ground. Fill peat pots with potting soil and sew three or four seeds, ¼" under the soil. As seeds mature, thin to a single plant, saving the strongest grower.

Live plants: Position jalapeno plants to receive maximum sun. Peppers should be spaced 16" to 18" apart. Dig a hole to match the size and shape of the plant's container. Slowly fill the hole with water and allow the water to drain. Place the plant in the hole and gently backfill with soil.

Watering:  Jalapeno peppers need about 1" of water per week. Watering should take place at the base of the plant and timed so as not to let the soil become dry.

Fertilizing: Fertilization should be light, with a 10-10-10 fertilizer. Feed once when plants are put in the ground and again when plants reach 12" high.

Harvesting: Jalapeno peppers take 90 days to reach maturity and are typically harvested while still green. Fully mature peppers will turn red.


Anthracnose: Appears as round, sunken spots on peppers. Anthracnose can come from overripe peppers resting on wet soil. Remove the bottom foot of leaves from plants. Make sure to water at the base of the plant and don't wet the leaves.

Blossom End Rot: Brown or black spots at the blossom end of a pepper. Blossom end rot is caused by a lack of calcium in the plant. Avoid high nitrogen fertilizers and uneven watering.


Aphids: Small, soft-bodied insects that suck moisture from plants. Ladybugs are a great way to control aphids. Consider insecticidal soaps as an alternative to pesticides.

Saving Seeds: Seeds can be removed from the inside of ripe peppers. Use gloves and wash hands completely after handling. Rinse the seeds and allow them to dry completely. Store collected seeds in an airtight container and keep them in a cool, dry place.

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