Poblano pepper plant with large dark green heart-shaped chile fruit

How to Grow Poblano Pepper From Seed

By Maxim Kaufman — Founder & CEO, Organo Republic

Updated July 2026

The Poblano is a large, heart-shaped chile with glossy, dark-green skin that ripens to a deep reddish brown. It is mild, roughly 1,000 to 2,000 Scoville, with a rich, earthy flavor and thick walls built for roasting and stuffing. This is the classic pepper for chiles rellenos, and when the ripe red fruit is dried it becomes the sweet, raisiny ancho chile. Handsome, productive, and endlessly useful in the kitchen, the Poblano is a must-grow for cooks.

Ready to grow your own? Shop Mild Chilli Pepper Poblano Seeds from Organo Republic.

This is the quick guide to Poblano. For the full step-by-step on starting seeds, transplanting, feeding, and troubleshooting peppers, see our complete guide to growing peppers from seed.

Quick start

Start seeds indoors about 8 weeks before your last frost, kept warm at 75 to 85F. Harden the plants off, then transplant them out 18 to 24 inches apart once nights stay above 55F. Give full sun, steady water, and a stake or cage to support the large, heavy fruit. Pick peppers dark green for roasting from about 65 to 75 days, or let them ripen to deep red at around 90 days to dry as ancho chiles.

Best tip

Poblano is a robust, heavy-yielding chile, but it needs a long, warm season to size up its big fruit. Start seeds indoors early and wait until nights stay above 55F to transplant. In hot regions like Texas or Florida, a little afternoon shade during heat waves helps the blossoms set; note that heat stress can also raise the pepper's spice. Pick dark green for roasting, or leave some to ripen red and dry them into rich, sweet ancho chiles.

At a glance

Botanical nameCapsicum annuum

Plant typeWarm-season annual

USDA zones3 to 12 (grown as an annual)

SunFull sun (6 to 8+ hours)

Days to maturity65 to 75 days green; ~90 red

Height24 to 36 inches

Spacing18 to 24 inches apart

WaterRegular and deep; keep evenly moist

Uses

The Poblano is the classic chile relleno pepper: roast and peel it, then stuff with cheese and fry. Its rich, earthy flavor also shines in rajas, mole, soups, and cornbread, and its thick walls roast and freeze beautifully. Let the fruit ripen red and dry it to make ancho chiles, the sweet, raisiny backbone of many Mexican sauces. At 1,000 to 2,000 Scoville it delivers deep flavor with only gentle heat.

Frequently asked questions

How long does a Poblano pepper take to grow?

Poblanos are ready to pick dark green for roasting in about 65 to 75 days from transplant, and ripen to deep red by around 90 days. Start seeds indoors about 8 weeks before your last frost, since peppers are slow starters.

How hot is a Poblano pepper?

Poblano is a mild chile at roughly 1,000 to 2,000 Scoville, delivering rich, earthy flavor with only gentle heat. Heat stress during hot, dry weather can make individual peppers a bit spicier.

What is the difference between a poblano and an ancho?

They are the same pepper at different stages. A fresh green or red poblano becomes an ancho chile once the ripe red fruit is dried, developing a sweet, raisiny flavor.

How big does a Poblano plant and fruit get?

Plants grow about 24 to 36 inches tall, and the heart-shaped fruit reaches 4 to 5 inches long. Because the peppers are large and heavy, a stake or cage helps keep branches from breaking.

Ready to grow your own? Poblano seeds give you large, mild, dark-green chiles perfect for roasting and stuffing, or dry the ripe red fruit into rich ancho chiles. For the full step-by-step, see our complete pepper growing guide linked at the top of this page.

Sale

Poblano Pepper Seeds – Non-GMO HeirloomHeirloom, non-GMOHeirloom Poblano — rich, mild chiles perfect for chiles rellenos and roasting.

Price$4.99Starting at$3.99

View product

Want more peppers? These value packs pair mild chiles like Poblano with other varieties:

Sale

Pepper Seeds Variety Pack – Non-GMO Heirloom13 super-hot varietiesThirteen fiery chilis for heat lovers, from habanero to the hottest peppers we carry.

Price$19.99Starting at$16.99

View product

By Maxim Kaufman — Founder & CEO, Organo Republic

Maxim founded Organo Republic in 2017 and personally selects, tests, and grows the heirloom, non-GMO varieties the company offers. Under his leadership, Organo Republic was named Agri Business Review’s Top Non-GMO Seed Variety Solution 2026.