VegetablePepper
Jalapeno M Pepper
Jalapeno M is a tall, open-pollinated pepper that brings medium heat and productivity to gardens across hardiness zones 4-13. Growing 18-30 inches tall with an upright habit, this heirloom cultivar reaches harvest in just 70-79 days from transplant, delivering green peppers ready for fresh eating or pickling, or allowed to mature red for drying. With 2,500-5,000 Scoville Heat Units, it offers genuine jalapeno bite without overwhelming heat, and its compact stature makes it surprisingly at home in containers on patios as well as traditional garden beds.
Photo © True Leaf Market
Growing Conditions
USDA Zone
4-13
Sunlight
Full Sun
Water
Moderate
Soil
Well-drained, Fertile Loam With Organic Matter
Growth Stats
30 in
Height
TypeUpright
Spacing
12
Plant Profile
Sunlight
Full Sun
Water
Moderate
Zones
4-13
Size
30in H x ?in W
Growth
—
Care
High
Hover over chart points for details
Highlights
Jalapeno M stands taller than typical jalapeno varieties, creating a more substantial plant that feels generous in the garden. This open-pollinated cultivar thrives in containers, raised beds, and ground plots alike, giving gardeners multiple pathways to success. The flexibility to harvest green peppers for immediate use or pickling, or allow them to ripen red for drying, means a single plant offers multiple culinary directions without replanting.
Common Uses
Jalapeno M peppers transition between uses depending on harvest timing. Pick them green for the classic jalapeno experience: sliced fresh into salsas, nachos, and cornbread, or left whole for pickling. Allow them to ripen fully red on the plant, then dry them slowly for chipotles or ground chili powder. Their compact plant size makes them especially useful for container gardeners who want full-size pepper production without sprawling vines.
Growing Timeline
No timeline data available yet for this variety.
Care Instructions
Start Indoors
Start seeds indoors 8-10 weeks before your last spring frost. Sow seeds 1/4 inch deep in warm, moist seed-starting mix and maintain soil temperatures of 70-80°F for reliable germination. Keep the soil consistently moist and provide bright light once seedlings emerge to prevent leggy growth.
Transplant Outdoors
Transplant seedlings outdoors after hardening off for 7-10 days, once soil temperature reaches 60-70°F and nighttime temperatures reliably stay above 50°F (typically 2-4 weeks after your last frost date). Space plants 12 inches apart with rows 36 inches apart. Bury the stem slightly deeper than the nursery pot to encourage a stronger root system.
Harvesting
Jalapeno M peppers are ready to pick green 70-79 days after transplant, when they reach 2-3 inches long with a firm, glossy feel. Cut peppers from the stem rather than pulling to avoid damaging branches. For red peppers suitable for drying, leave mature green peppers on the plant another 2-3 weeks until they shift to deep red. Continuous harvesting of green peppers encourages the plant to produce more blooms throughout the season.
Pruning
Pinch off the first few flower clusters when plants are 6-8 inches tall to encourage branching and a bushier, more productive plant. As plants mature, light pruning of overcrowded interior growth improves air circulation and reduces disease pressure. The upright growth habit means minimal pruning is needed compared to sprawling pepper varieties.
Growing Calendar
Enter your ZIP code to see a personalized growing calendar for this plant.
Companion Planting
Pests & Diseases
Ecology & Traits
Deer ResistantEdible
Scientific Classification
Capsicum annuum
Family
Solanaceae
Genus
Capsicum
Growth Habit
Upright
Native Status
L48 (NI)HI (I)PR (I)VI (I)
History & Origin
“This is an open-pollinated, heirloom jalapeno preserved and distributed through seed catalogs as a selection valued for its height and vigor. The name 'M' likely designates a specific cultivar selection within the broader jalapeno family, though exact breeding history is not documented in available sources. As an heirloom variety offered by mainstream seed companies like True Leaf Market, it represents the kind of tried-and-true pepper that home gardeners have grown repeatedly, refined, and trusted enough to pass forward.”