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Mammoth Jalapeño

Family: Solanaceae Hot Pepper
Zone 2b Save Garden

Planting Schedule

Add Mammoth Jalapeño to your garden to build a schedule and get reminders.

Sink your senses into Mammoth Jalapeño’s glossy, deep-green pods—thick-walled and boldly tapered, with a bright, peppery snap that builds into a confident, medium-hot heat.

At maturity (about 80 days), the fruits hold their substantial heft and shine, making them ideal for roasting over open flame, quick pickling for tangy relish, and bold salsas where their rich, vegetal character carries through. Grow one plant and you’ll be rewarded with a steady harvest of showy, kitchen-ready peppers that look as impressive as they taste.

Light: Full SunMaturity: 80 DaysHabit: Bush

Botanical illustration of Mammoth Jalapeño

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Crop Dates : 2b

Growing note: This crop establishes over multiple seasons (~80 days / ~1 year to first harvest). Plant on the frost schedule; first harvest follows establishment, not a single frost-free season.
MilestoneDate
Start IndoorsMar 20th
Last FrostMay 15th
Transplant / Sow OutdoorsJul 10th
Harvest BeginsSep 28th
Harvest EndsAug 25th

Crop Details

TraitValue
Days to Maturity80
Sun RequirementsFull SunFull sun
Growth HabitBush
Support NeededStake
Planting DepthNormal
Germination Temp (°F)80
Min Soil Temp (°F)60
Min Night Temp (°F)50
Harden Off (days)10

Culinary Notes

Chef's Note

Mammoth Jalapeño is built for kitchens: the thick walls keep a clean bite after roasting or quick-pickling, and the heat lands confidently without turning harsh. Use it when you want jalapeño flavor to show up in the texture—snappy, not soggy—and let lime and smoke carry the finish.

Best Uses

  • roast over flame and chop into smoky salsa
  • quick-pickle into tangy cowboy-style relish
  • sear slices in oil for charred fajita-style topping
  • stuff and bake until the skin blisters and the walls go tender

Flavor Profile

crisp pepper snap thick, vegetal sweetness medium-hot jalapeño heat bright, grassy finish

Kitchen Pairings

lime garlic cheddar corn tortillas black beans smoked salt

Frequently Asked Questions

What pest or disease is most likely on Capsicum annuum (Mammoth Jalapeño), and how do I manage it?
Watch for aphids and spider mites, which can cause leaf stippling and curling, especially during warm, dry stretches. Spray affected plants with a strong jet of water, then repeat as needed; for persistent outbreaks, use insecticidal soap or horticultural oil following label directions. Also keep an eye out for bacterial leaf spot—remove and discard infected leaves and avoid wetting foliage when you water.
How often should I water Capsicum annuum during the main growing phase?
During fruiting, keep the root zone evenly moist: water when the top 1–2 inches of soil feel dry, then water deeply so moisture reaches the main feeder roots. Inconsistent watering (quick dry-spells followed by heavy watering) increases blossom-end problems and can lead to bitter, misshapen peppers. Aim for about 1–2 inches of water per week total (rain + irrigation), adjusting upward in hot weather and container growing.
How can I tell when Mammoth Jalapeño is ready to harvest?
Harvest when the peppers reach full size and have a glossy, firm skin; Mammoth Jalapeño is typically ready around 80 days from transplanting. For a jalapeño-style harvest, pick when they are green, firm, and about 3–4 inches long; if you leave them to mature longer, they will turn red and become sweeter. Use scissors or snips to cut the stem, leaving the plant intact.

Garden Alerts

This crop establishes over multiple seasons (~80 days / ~1 year to first harvest). Plant on the frost schedule; first harvest follows establishment, not a single frost-free season.

Garden Alerts

This crop establishes over multiple seasons (~80 days / ~1 year to first harvest). Plant on the frost schedule; first harvest follows establishment, not a single frost-free season.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 10 days first.

Expert Note

Start peppers on the early side, keep soil evenly warm (and not soggy), and transplant only once nights are consistently mild to avoid stunting.