The walnut tree is a real showstopper, mostly because of its massive size. These giants can tower up to 100 feet tall! Naturally, that leaves a lot of us wondering: is there any way to keep a walnut tree small enough to grow in a pot?
Standard walnut trees are just too big for containers
A mature walnut tree is a force of nature, often reaching heights of 100 feet with a canopy spreading 30 to 50 feet wide. But it’s not just what’s happening above ground that’s the issue; the root system of a walnut tree is incredibly thick and expansive. In a standard container, those roots would run out of room in no time.
Alternative options for container growing
If you’ve got your heart set on a walnut tree but don’t have a massive estate, don’t worry! You still have a couple of options for container gardening:
- You can opt for specialized dwarf varieties.
- Or, you can try your hand at the art of bonsai.
Specialized dwarf walnut varieties
Plant breeders have developed specific dwarf walnut varieties that are perfect for pot life. These trees are grafted onto “weak” rootstocks, which naturally stunts their growth. Unlike their giant cousins, these little guys grow very slowly and stay manageable.
Just keep in mind that “dwarf” is a relative term. For example, the popular “Europa” variety tops out at about 11 feet—which is small for a walnut, but still usually better off planted in the ground. If you want a true patio tree, look for varieties that max out around 5 feet tall with a trunk circumference of about 20 inches.
Creating a walnut bonsai
Another way to keep a walnut tree compact is to grow it as a bonsai. This allows you to cultivate the tree in shallow trays or small pots. However, a word of warning: some purists argue against walnut bonsais because the tree’s naturally large leaves and vigorous growth habit can make it a bit of a challenge to maintain that classic bonsai look.
Caring for your container walnut tree
To keep your potted walnut happy, make sure it’s in a sunny location. They love the light! You’ll need to water it regularly, but be careful not to overdo it—walnuts hate “wet feet,” so make sure the pot drains well to avoid standing water.
The best part about dwarf varieties
One of the coolest things about dwarf walnuts is how fast they produce. While a standard walnut tree might make you wait 10 to 15 years for its first harvest, many dwarf varieties will start giving you nuts after just three years. Talk about instant gratification!
