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Poblano Pepper
Beginner

Poblano Pepper

Capsicum annuum

Family: Solanaceae

Poblano peppers are large, mild peppers (1,000-2,000 Scoville units) essential to Mexican cuisine. Fresh they're called poblanos; dried they become anchos. Their large size makes them perfect for stuffing, and their mild heat is family-friendly.

Days to Harvest

70-90 days

Sun Needs

Full Sun (6-8+ hours)

Water Needs

moderate

Germination Temp

80°F optimal

Seed Starting

Start Indoors

8 weeks before last frost

Germination

7-14 days

Seed Depth

1/4 inch

Light to Germinate

No

đź’ˇ Tip: Use heat mat. Large plants need good spacing.

Growing Conditions

Soil Type

Rich, well-draining soil

pH Range

6 - 6.8

Spacing

18-24 inches between plants

Companion Plants
âś“ Tomatoesâś“ Onionsâś“ Cilantro

⚠️ Avoid planting near:

âś— Fennelâś— Brassicas
History & Nutrition

History

The poblano pepper takes its name from Puebla, the central Mexican state where it has been cultivated since pre-Columbian times and remains a cornerstone of regional cuisine. The pepper holds a unique position in Mexican culinary culture as both a fresh and dried ingredient—when used fresh it's called poblano, but when dried it becomes the ancho chile (from "ancho" meaning "wide"), creating essentially two distinct ingredients from the same pepper. The dish chiles rellenos, featuring roasted poblanos stuffed with cheese or meat and coated in egg batter, originated in Puebla during the colonial period and has become one of Mexico's most beloved national dishes. The poblano's other famous culinary destination is mole poblano, the complex sauce containing dried anchos (and often two dozen other ingredients) that is considered one of Mexico's greatest culinary achievements. Interestingly, poblanos are sometimes mislabeled as "pasilla" peppers in California due to a regional naming convention that has persisted despite being technically incorrect (true pasillas are different dried chiles). The pepper's mild heat level—gentler than jalapeño—combined with its large size and thick flesh has made it ideal for the North American market, where it's now widely available in mainstream supermarkets and has become a popular gateway for Americans exploring Mexican cuisine beyond Tex-Mex.

Nutritional Benefits

  • âś“High in Vitamin A
  • âś“Good source of Vitamin C
  • âś“Contains fiber
Climate & Temperature

Optimal Growing Temp

70°F - 85°F

Poblanos thrive in moderate warmth. Soil temps should reach 65-70°F for transplanting. Can tolerate some cool nights better than hotter varieties.

Survival Range

55°F - 95°F

Can survive these temperatures

tender
warm Season

Best USDA Zones

Zone 7Zone 8Zone 9Zone 10

Humidity

40-60%

Moderate humidity ideal. High humidity can cause fungal issues on large leaves and thick-walled fruit.

Plant Size & Growth

Height

24-36 inches

Spread

18-24 inches

Growth Habit

upright

annualRoot Depth: Moderate root system, 12-18 inches. Strong roots support large pepper production.
Growth Stages

Germination

7-14 days

Good germination rate. Bottom heat (75-80°F) helps. Cotyledons emerge with typical pepper appearance.

Seedling Stage

Duration: 4-5 weeks

True leaves: First true leaves appear 2-3 weeks after germination with larger leaves than hot peppers

Transplant ready: Ready when 5-6 inches tall with 4-6 true leaves and sturdy stems

Vegetative Growth

Duration: 5-6 weeks

Plants develop strong structure to support large peppers. Feed regularly.

Flowering

Timing: 6-8 weeks after transplant

Duration: 2-3 weeks

Self-pollinating with white flowers. Night temps above 55°F needed for fruit set.

Fruit Development

Begins: 8-12 weeks after transplant

Duration: 4-5 weeks per pepper

Large, heart-shaped peppers develop. Dark green, ripen to red-brown.

Harvest Maturity

Timing: 65-80 days from transplant

  • Peppers reach 4-6 inches long
  • Dark green glossy skin
  • Firm to the touch
  • Heart-shaped form fully developed
Expected Yield

Per Plant

6-12 large peppers per plant over the season

Per Square Foot

3-6 peppers

Harvest Frequency

Every 1-2 weeks once fruiting begins

Factors Affecting Yield

  • •Large pepper size means fewer per plant but substantial yield by weight
  • •Consistent moisture and nutrition maximize size
  • •Harvest promptly to encourage continued production
  • •Warm conditions speed development
Watering Guide

Seedling Stage

Keep evenly moist

Established Plants

Water when top inch dries

During Fruiting

Regular deep watering for large pepper development

Preferred Method

Drip irrigation or careful hand watering at soil level

⚠️ Critical Watering Periods

  • • Flowering and fruit development need consistent moisture for maximum size

Pro Tips

  • PRO TIP: Consistent water produces the large, thick-walled peppers ideal for stuffing
  • Inconsistent watering causes blossom end rot
  • Mulch heavily to maintain moisture
  • Morning watering reduces disease
Fertilizing Guide
moderate feederRecommended: 5-10-10 or tomato/pepper fertilizer

Feeding Schedule

Seedling

Half-strength balanced fertilizer

Weekly

Vegetative

Balanced fertilizer to build strong plant

Every 2 weeks

Flowering

Switch to bloom formula (higher P-K)

Every 2 weeks

Fruiting

Continue bloom formula

Every 2-3 weeks

Organic Options

Fish emulsionCompost teaBone mealKelp

Every 2-3 weeks during active growth

Container Growing
âś“ Suitable for containers

Minimum Size

5 gallons

Recommended Size

7-10 gallons

Depth Required

At least 12 inches deep

Best Varieties for Containers

PoblanoTiburonMulato Isleno

Container Tips

  • Needs larger container due to plant and pepper size
  • Support may be needed when laden with fruit
  • Regular watering essential in containers
  • Good drainage critical
Support & Trellising
Support Optional

Support Type

stake

Height Needed

2-3 feet

When to Install

Install when plants begin setting fruit to prevent branch breakage

Method

Optional stake for support when heavily laden

Tips

  • Large peppers can weigh down branches
  • Tomato cages provide good support
  • Stake central stem for extra stability
✂️
Pruning Guide
Pruning Optional

Why Prune

Improve air circulationSupport large fruitRemove damaged material

When

Early season shaping, ongoing maintenance

Technique

Remove lower leaves for air circulation, thin interior for light penetration

Remove

  • âś— Low branches touching soil
  • âś— Interior congested growth
  • âś— Damaged or diseased foliage

Keep

  • âś“ Main stems
  • âś“ All flowering branches
  • âś“ Developing peppers
Succession Planting

Plant Every

3-4 weeks for extended harvest

Sowings/Season

2-3 plantings

Duration

6-8 weeks of succession planting window

Tips

  • Succession planting ensures fresh poblanos through the season
  • Last planting 85-95 days before first frost
  • Later plantings can be dried as anchos
Frequently Asked Questions

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