Pepper (Mammoth Jalapeño)

Mammoth Jalapeno is an F1 hybrid jumbo jalapeno in Decatur's Zone 8a, bred for extra-large, thick-walled 4-6 inch pods on a vigorous, high-yielding plant, with a moderate heat level (roughly 3,000-5,000 SHU) and especially well suited to stuffing and baking.

1. 1

   Seedling

   Weeks 1-8 after sowing, started indoors mid-to-late January for transplant after last frost (~Mar 28)

   You'll see Oval cotyledons first, then pointed true leaves; growth is slow and steady, and a healthy seedling stays compact and deep green.

   Do Keep soil warm (75-85F, a heat mat speeds and evens germination) and give strong, close light right away to prevent stretching.

   Details
2. 2

   Transplant

   Late March through mid-April, once nighttime lows hold above 55F and soil has warmed

   You'll see A ready transplant has 4-6 true leaves and a sturdy stem, ideally no flower buds yet.

   Do Harden off over 5-7 days, transplant into warm soil, and stake or cage this vigorous, heavy-fruiting plant early, giving it generous room to spread.

   Details
3. 3

   Establishing / early branching

   First 2-3 weeks after transplant

   You'll see Resumed leaf growth, new side branches forming, and the first flower buds appearing at the growing tip.

   Do Top or pinch the plant once and remove the first flower bud(s) to push branching before letting it fruit freely.

   Details
4. 4

   Flowering and fruit set

   Late May through September

   You'll see Small white, star-shaped flowers open along the branches and swell rapidly into tiny green peppers that bulk up toward their eventual 4-6 inch jumbo size.

   Do Keep watering especially consistent through fruit set, since this variety's large, thick-walled pods are sensitive to water swings.

   Details
5. 5

   Corking and ripening

   Roughly 60-75 days from transplant to first mature-size green fruit, reaching 4-6 inches long and 1.5-2 inches wide; full color change to red takes another 2-4+ weeks

   You'll see Corking (light tan to brown, cork-like streaks on the skin from rapid growth) is common and expected on these fast-sizing jumbo pods; fruit then shifts from smooth dark green toward red as it fully ripens.

   Do Treat corking as a sign of good growth and near-ripeness, and harvest most fruit at the smooth, dark-green, full-size stage this variety is bred for, especially for stuffing.

   Details
6. 6

   Harvest and drying

   Ongoing through the season, with a final push before first frost (~Nov 12)

   You'll see Firm, glossy, smooth dark green fruit at full 4-6 inch size is ready; the thick walls make this variety slower to air-dry than thinner-walled peppers.

   Do Pick with scissors or pruners at full green size for stuffing and baking, and route any surplus toward a dehydrator rather than plain air drying.

   Details
7. 7

   Seed saving

   From fully mature (red, color-ripened), overripe fruit at the end of the season

   You'll see Seeds are pale tan, flat, and firm inside a fully ripe red fruit; seed from green fruit is underdeveloped and won't germinate well.

   Do Saving seed is mainly useful for continued eating stock, not for reproducing this exact plant, since it's an F1 hybrid.

   Details

Techniques — transplant, prune, propagate, divide, seed