As I started growing plants in feed bags, I started to ask the question, how much soil do plants really need?
If you've asked that yourself, and specifically about pepper plants, then I'm here to help!
In this article, I'll share some questions to ask, some insights, and some personal experiences, to help you make the best choice on what container to use for your pepper plant.
So let's get started!
Quick Facts
| Pepper Group | Standard Pot Size (Volume) | Suggested Depth (inches) | Suggested Diameter (inches) | Max Yield Pot Size (Volume) | Growth Duration Consideration | Stake Recommendation |
|---|---|---|---|---|---|---|
| Jalapeño, Cayenne, etc. | 2-3 gallons | 10-12 | 10-12 | 5 gallons | Consider larger pot if growing multiple years | Recommended, especially when fruiting |
| Bell Pepper, Poblano/Ancho, etc. | 5-7 gallons | 12-14 | 14-16 | 10 gallons | Consider larger pot if growing multiple years | Highly recommended due to larger fruit size |
| Habanero, Ghost Pepper, etc. | 7-10 gallons | 14-16 | 16-18 | 12-15 gallons | Consider larger pot if growing multiple years | Recommended, especially when heavily fruiting |
Why does Container Size matter?
The size of the container directly influences the growth of your plant and, consequently, its yield.
If you have a larger container, you'll get (or should at least get) a more bountiful harvest. This happens because a larger pot offers more soil, which means more room for the roots, to spread out and grow.
A larger container allows the plant to absorb more nutrients and water, leading to healthier growth and more energy to produce peppers.
On the other hand, something smaller can directly restrict the growth of the roots.
When roots become “root-bound” or “pot-bound”, what happens is they can't expand and take up the necessary nutrients and water as efficiently.
This results in a stressed plant, which limits its energy, and then leads to fewer peppers.
Would You Ever Want To Use Small Containers?
Of course!
Just because you use a smaller container doesn't mean that you're not going to get a harvest. It just means that you're going to not get as big of a harvest as you could have.
So, if you're trying to maximize your harvest, or grow as much as you can per plant, then using a smaller container wouldn't be the best option.
However, one of the reasons why you would need to choose a small container is if you're in an area with a shorter growing season.
Small containers, with their reduced soil volume, will encourage the plant to fruit earlier and get a harvest earlier. This would then ensure that you will get a harvest even before your first frost hits.
Additionally, if your garden (or backyard) is limited in space, you would also need to use smaller containers as they'll occupy less space than larger ones.
Minimum Container Size To Use For Growing Peppers
Unfortunately, there really isn't a ‘minimum' size when it comes to growing peppers.
The reason being is because there are some varieties of peppers that are very small, and so they don't need a lot of space. You can get away with less than gallon-sized pot, since they're so small.
However, from what I've gathered online, the general consensus is around 3 gallon per plant.
Some say they get away with 2 gallons, but once again, they're probably not getting as good of a harvest as those who use more soil.
Small Peppers Recommendation: 3+ gallons (about 11 liters)
Most of the small peppers don't require a lot of space to flourish. So three gallons is perfect for peppers like, Cayenne, Fresnos, Aji Charapita, Serrano, Thai Chilies, and other small pepper varieties.
Full-sized Peppers Recommendation: 5+ gallons (About 19 liters)
Larger peppers, like Bell or Ghost Peppers, Habanero or Pablano, would benefit from extra space, to help them reach their full potential and make a more abundant harvest.
Find What Works Best For You
Choosing the right container size for your pepper plant depends on your situation, your growing season, and what you're trying to achieve.
For example, I'm currently trying one of my Bell pepper plants in a 5 gallon feed bag, while the rest of them are in 2-3 gallons, since I don't have the space for larger bags.
Remember, it's not just about the harvest but also about giving your plant the best possible environment to thrive.