Poblano 'Mulato'
Capsicum annuum 'Mulato'
A traditional Mexican poblano variety that produces large, heart-shaped peppers perfect for chiles rellenos and authentic Mexican cooking. When fresh, these peppers offer mild heat and rich flavor, and when dried they become mulato chiles - one of the essential peppers for mole sauce. An absolute must for serious Mexican cuisine enthusiasts.
Harvest
80-90d
Days to harvest
Sun
Full sun
Zones
4–11
USDA hardiness
Height
1-3 feet
Planting Timeline
Showing dates for Poblano 'Mulato' in USDA Zone 7
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Poblano 'Mulato' · Zones 4–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 3 | April – April | June – July | — | September – October |
| Zone 4 | March – April | June – June | — | September – October |
| Zone 5 | March – March | May – June | — | August – October |
| Zone 6 | March – March | May – June | — | August – October |
| Zone 7 | February – March | April – May | — | July – September |
| Zone 8 | February – February | April – May | — | July – September |
| Zone 9 | January – January | March – April | — | June – August |
| Zone 10 | January – January | February – March | — | May – July |
| Zone 1 | May – May | July – August | — | October – August |
| Zone 2 | April – May | June – July | — | September – September |
| Zone 11 | January – January | January – February | — | April – June |
| Zone 12 | January – January | January – February | — | April – June |
| Zone 13 | January – January | January – February | — | April – June |
Complete Growing Guide
This cultivar demands patience and warmth more than standard peppers, requiring consistently warm soil (75–85°F) and a full 80–90 days to produce its distinctive heart-shaped fruits, so plan backward from your first frost date accordingly. Mulatos thrive in rich, well-draining soil with afternoon shade in hot climates, as excessive heat can cause flower drop before fruit sets. Watch closely for spider mites and aphids, which favor the poblano's dense foliage, and ensure good air circulation to prevent powdery mildew—a common issue when humidity stays high. This variety has a tendency toward leggy, stretching growth if light is insufficient, so provide at least 6–8 hours of direct sun daily. For serious mole makers, allow several fruits to fully mature and darken on the plant before harvesting and drying them indoors; this concentrates the earthy, complex flavors that define authentic mulato chiles.
Light: Full sun (6 or more hours of direct sunlight a day). Soil: Clay, High Organic Matter, Loam (Silt), Sand. Soil pH: Acid (<6.0), Alkaline (>8.0), Neutral (6.0-8.0). Drainage: Good Drainage. Height: 1 ft. 0 in. - 3 ft. 8 in.. Spread: 0 ft. 6 in. - 1 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Medium. Maintenance: Low. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.
Harvesting
Poblano 'Mulato' peppers reach peak harvest readiness when they transition from green to a deep, glossy dark brown or nearly black color, a process that takes several weeks after the initial fruit set. At this stage, the peppers should feel firm yet slightly yielding to gentle pressure, and have reached their full heart shape, typically 3-4 inches long. For fresh use in chiles rellenos, harvest at the darker green stage; for drying into authentic mulato chiles, wait until they achieve that characteristic dark brown color. This variety responds well to continuous harvesting—picking mature peppers regularly encourages the plant to produce additional flowers and fruit throughout the season rather than focusing energy on fewer, larger peppers. A critical timing tip: harvest in the early morning when peppers are fully hydrated, as they'll have better texture and flavor for immediate cooking or drying.
Fruits are a non-pulpy berry and vary considerably across cultivars. Some are long, thin, bright red, and spicy; others are thick, large, and sweet-tasting; others still are small and in ornamental shapes and colors, grown as decoration.
Color: Black, Gold/Yellow, Green, Orange, Red/Burgundy. Type: Berry. Length: 1-3 inches. Width: < 1 inch.
Garden value: Edible, Good Dried, Showy
Harvest time: Summer
Edibility: Fruits edible, but spiciness is unpredictable in intensity.
Storage & Preservation
Store fresh Mulato peppers in a plastic bag or breathable container in the refrigerator at 45–50°F with 85–95% humidity. They'll keep for two to three weeks, longer if harvested at full maturity when the skin is completely dark. For extended preservation, freezing works well: halve or dice the peppers, remove seeds, and freeze on a tray before bagging. Roasted and peeled peppers freeze beautifully for chiles rellenos preparation. Drying is ideal for this variety—hang whole peppers in a warm, airy space until papery and completely dark, then store in an airtight container. Dried Mulatos are essential for authentic mole sauce and keep for months. You can also char fresh peppers over flame, peel, and preserve in oil-vinegar mixtures. Mulatos develop deeper, more complex flavors as they dry, making this method particularly worthwhile for capturing their rich, earthy character for winter cooking.
History & Origin
The Mulato poblano originates from Mexico, where it has been cultivated for centuries as part of the country's rich pepper heritage. While specific breeder documentation and introduction dates are not well-recorded in academic literature, the Mulato represents a naturally selected variant within the broader poblano pepper lineage (Capsicum annuum), distinguished by its darker color and exceptional flavor when dried. The variety became standardized through traditional seed-saving practices among Mexican farmers and cooks who recognized its superior qualities for mole preparation and regional cuisine. Its introduction to commercial seed catalogs in North America occurred gradually throughout the twentieth century as Mexican culinary traditions gained recognition, though the exact seed company or year of formal introduction remains undocumented in readily available sources.
Origin: Tropical North and South America
Advantages
- +Large heart-shaped peppers ideal for traditional chiles rellenos preparation
- +Dual-purpose harvest: fresh poblanos or dried mulato chiles for mole
- +Rich, earthy flavor with mild heat suits authentic Mexican cuisine
- +Moderate 80-90 day maturity allows reasonable growing season completion
- +Versatile culinary application across fresh and dried Mexican dishes
Considerations
- -Susceptible to multiple serious diseases including bacterial spot and verticillium wilt
- -Vulnerable to pepper maggot and flea beetle pest infestations requiring management
- -Moderate difficulty rating suggests inexperienced growers may face challenges
- -Requires warm growing conditions and consistent care for optimal pod development
Companion Plants
Basil and marigolds are the two worth planting close. Basil's volatile oils may confuse aphids during their host-searching phase — aphids are a documented Mulato pest, so any deterrent is worth a 12-inch gap between plants. Tagetes patula marigolds exude alpha-terthienyl from their roots, which suppresses soil nematodes; plant them at the bed edges, not just as a border ornament. Carrots and parsley stay shallow and don't pull water from the 12–18 inch depth where pepper roots run. Fennel produces allelopathic compounds that stunt most vegetables — give it at least 10 feet of clearance, or just don't grow it in the same plot.
Plant Together
Basil
Repels aphids, spider mites, and thrips while potentially enhancing pepper flavor
Marigold
Deters nematodes, aphids, and whiteflies with natural compounds
Tomato
Similar growing requirements and can share trellising systems
Oregano
Repels cucumber beetles and provides ground cover to retain soil moisture
Parsley
Attracts beneficial insects like hoverflies that prey on aphids
Carrots
Utilize different soil layers and carrots help break up soil for pepper roots
Nasturtium
Acts as trap crop for aphids and cucumber beetles
Chives
Repels aphids and may help deter larger pests like rabbits
Keep Apart
Black Walnut
Releases juglone which is toxic to peppers and causes stunted growth
Fennel
Inhibits growth of most garden plants through allelopathic compounds
Brassicas
Compete for similar nutrients and may stunt pepper growth
Apricot Trees
Can harbor verticillium wilt which easily spreads to pepper plants
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #2747662)
Pests & Disease Resistance
Resistance
Moderate disease resistance, good heat tolerance
Common Pests
Aphids, pepper maggot, flea beetles, cutworms
Diseases
Bacterial spot, cercospora leaf spot, verticillium wilt
Troubleshooting Poblano 'Mulato'
What you'll see, why it happens, and what to do about it.
Sunken, dark, leathery patch on the bottom or side of the fruit — often showing up once fruits are sizing up
Likely Causes
- Blossom end rot — a localized calcium deficiency in the developing fruit, not always a soil calcium shortage
- Inconsistent watering causing water stress that blocks calcium uptake
- High ammonium-nitrogen fertilizer salts interfering with calcium movement
What to Do
- 1.Water deeply and consistently — 1 inch per week, don't let the soil dry out and then flood it
- 2.Mulch around plants to hold moisture and even out wet/dry swings
- 3.Back off high-nitrogen synthetic fertilizers mid-season; switch to a balanced or lower-N formula after transplants establish
Small, water-soaked spots on leaves and fruit that turn brown and scabby, sometimes with a yellow halo — appearing any time during the season but worse in wet weather
Likely Causes
- Bacterial spot (Xanthomonas campestris pv. vesicatoria) — spreads fast in warm, wet conditions via splashing water
- Overhead irrigation or rain hitting foliage repeatedly
What to Do
- 1.Switch to drip irrigation or water at the base; keep leaves dry when you can
- 2.Remove and bag heavily infected leaves — don't compost them
- 3.Rotate peppers (and all nightshades) out of that bed for at least 2 seasons, per NC State Extension organic disease management guidance
Tiny, irregular shothole pits scattered across the leaves — mostly on young transplants within the first 2–3 weeks in the ground
Likely Causes
- Flea beetles (Epitrix spp.) — small, shiny, fast-jumping beetles that feed heavily on stressed transplants
- Dry, warm conditions that favor flea beetle activity
What to Do
- 1.Cover transplants with row cover (Agribon-15 or similar) immediately after planting and leave it on for the first 3–4 weeks
- 2.Keep plants well-watered — stressed plants take much longer to outgrow flea beetle damage
- 3.Dust diatomaceous earth around the base to reduce pressure, but reapply after any rain
Frequently Asked Questions
How long does Poblano Mulato take to grow from seed to harvest?▼
Can you grow Poblano Mulato in containers?▼
What's the difference between poblano and mulato peppers?▼
Is Poblano Mulato good for beginner gardeners?▼
When should I plant Poblano Mulato seeds?▼
What does Poblano Mulato taste like?▼
Growing Guides from Wind River Greens
Where to Buy Seeds
Sources & References
External authority sources used in compiling this guide.
See the Methodology page for how this data is sourced, what's AI-assisted, and known limitations.
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