Vegetables

How to Plant, Grow, and Care for Poblano Peppers

It's surprisingly easy to grow poblano peppers, and they're great for cooking! With very few problems and a delicious taste, why not give them a go? Kaleigh Brillon will share this in-depth guide and top growing tips.

Learn how to grow....

poblano peppers, and you can chow down on them all year long! If you’ve ever ordered a chile relleno, you know how delicious poblano peppers are! They’re smoky and mild and can be harvested fresh as poblanos or dried as ancho chiles to use in countless recipes. (But you’ll probably be growing poblano peppers for chiles rellenos, right?)

Growing poblano peppers is pretty easy. If you’re familiar with growing chili peppers, bell peppers, jalapeños, banana peppers, or cayenne peppers, you already know the basics of growing poblanos since they’re all variations of the same pepper, the Capsicum annuum. With consistent moisture and plenty of sunlight, you’ll have peppers in no time.

Even if you’re not familiar with growing peppers, poblanos are a great choice to try for the first time. A poblano pepper will give you very few problems if you start them off strong. There are quite a few potential pests and diseases they’re susceptible to, but they’re easy to prevent and treat. Let’s get into how to grow them!
What is a Poblano Pepper?
Capsicum anuum ‘Poblano’ is part of a large group of peppers that are all the same species, but are incredibly different. This species ranges from spicy peppers like cayenne, to sweet peppers like bell peppers that aren’t spicy, and even other peppers like ornamental peppers.

Native Area
Poblano peppers are popular peppers from Puebla, Mexico. They stand out from others visually due to their heart-shaped fruit, which usually reaches about five inches in length and two to three inches wide. They’re mild on the spicy scale and have a great smoky flavor that tastes even better when smoked.

Characteristics
You can harvest a poblano pepper green or red, with red being spicier. If you allow them to dry, you’ll suddenly have what are called ancho peppers that are great for turning into sauces. They are great in many dishes outside of sauces as well, especially because they are lower on the Scoville scale.

If you don’t want to grow peppers that are high in Scoville heat units, poblanos are a great choice. Snag one from a local nursery and grow them under the cover of foliage next to where you grow tomatoes. Because they are self-pollinating, you won’t need more than one plant. You can have entire garden beds dedicated to Mexican cuisine, cultivating peppers, tomatoes, cilantro, and onions all in the same bed during the spring growing season.

Varieties
Before you start planting seeds, you should know there are several types of poblano peppers out there that are worth trying. In the ‘Ancho’ range, the ‘Ancho Large Mexican’ peppers are long and wide, making them ideal for stuffed peppers. The ‘Ancho Mulato’ turns brown instead of red and has a more noticeable smoky flavor. The ‘Ancho Sweet Hybrid’ is long and slender, turns a bright red, and is considerably sweeter than other poblano pepper varieties.

Planting
If you live in USDA zones 9-11, you can start poblano pepper seeds outside in the ground. Peppers usually do better when transplanted, but direct sowing your pepper seeds is convenient. If you live in the ideal climate, you might as well try it out to see if it works for you.

To sow pepper seeds directly, wait until after the last frost date and grow in an area with fine soil free of large chunks. Make sure the area drains well so the seeds and seedlings won’t be waterlogged. Set the seeds in early spring in warm soil consistently above 70°F (21°C).

Set the poblano pepper seeds no deeper than a quarter inch deep and thin them to two inches apart when seedlings sprout. You’ll eventually need to thin each poblano pepper plant to 12 inches apart as it matures.

Planting seeds indoors to move outside follows similar guidelines. Grow your seeds in an area with plenty of light, preferably from a sunny window or grow lights, and use a heat mat if necessary to reach a soil temperature of 70°F (21°C). Provide a humidity dome to give the pepper seeds enough moisture. Start your seeds indoors about eight weeks before the final frost.

Plant two to three seeds in each section of a seed tray a quarter of an inch deep, and thin them out to one plant per pot once they sprout. You can wait until the spouts are a few inches tall and choose the strongest seedling for the best results.

When it’s time to transplant the seedlings, remove the humidity dome and your seed tray from the heat mat, and space the plants 12 inches apart, so there will be plenty of room for the mature peppers.

How to Grow
Poblano peppers need plenty of sun and water, but how much is too much? Let’s get into the details so you can prevent accidents and properly care for them as they grow.
Maintenance

Pepper pruning is pretty subjective among gardeners, and it certainly will depend on your growing conditions. Some insist all peppers must be pruned, while others say it’s unnecessary and negatively impacts the harvest!

One form of pruning that you may have heard of is topping off. This is when you cut off the top two or three nodes of your pepper to encourage bushy and compact growth. If your poblano seedlings had a rough start and grew a bit leggy, you may find topping off helpful to get it back to a fuller state. Topping off may not be necessary if they are short with several sturdy stems. If t has too many stems, you can trim those off, but be careful not to remove any flower buds or you’ll affect your harvest.

Poblanos can be overwintered, so you can keep them next year. To do this, remove every single leaf and cut it back to just a few nodes. The pepper should have a Y shape with just two little shoots of the main stem. It’ll look sad and hopeless, but those nodes are where the new growth will show up! Gardeners in zones 9 or warmer can keep their peppers in the ground, but everyone else will need to bring their peppers indoors and put them under a grow light. To prevent bringing pests inside, wash all the soil off of the root ball and put them in pots with new soil.

Some peppers may need supportive stakes to keep them standing upright, especially if they grow most of their peppers on the top.