Magnolias are absolute showstoppers in the garden, and while we often see them as large shrubs, they look incredible when grown as full-sized trees. However, getting that classic “high-trunk” tree look doesn’t just happen by accident—you’ve got to give the plant a little guidance as it grows. Here is how you can train your magnolia into a beautiful focal point.
Pick the Right Variety
With over 200 species out there, not every magnolia is a candidate for tree-style growth. Some species can soar up to 60 feet tall, while others tap out at just six feet. One thing to keep in mind: magnolias don’t just grow up; they grow *out*. A naturally developed 30-foot magnolia takes up a massive amount of real estate, which most backyard gardeners just don’t have. Make sure you choose a variety that fits your space.
Pruning for Success
Generally speaking, I usually tell folks to avoid pruning magnolias if they can help it. If you overdo it, the tree reacts by sending out “water sprouts” (those ugly, vertical shoots) and might skip blooming the next year. But, if you want a high-trunk tree, you have to break the rules a bit. You’ll need to prune away any side branches on the main trunk as early as possible. The sooner you snip them, the faster the wounds heal and the lower the risk of infection. If that sounds like too much work, you can always buy a “standard” or pre-trained tree at the nursery—though they definitely come with a higher price tag because of all that professional care.
Location, Location, Location!
Finding the perfect spot in your yard is half the battle. Depending on the specific variety, your magnolia will want either full sun all day or a bit of partial shade. One pro tip: try to find a spot that’s sheltered from harsh winds. You also need to pay attention to your soil. Magnolias love acidic dirt. If your soil isn’t quite there, you can mix in some rhododendron potting soil to help hit that “sweet spot” pH level between 5.5 and 6.8.
To help your magnolia reach its full potential as a tree, remember these keys:
- Choose a sunny or partially shaded spot.
- Keep the soil on the acidic side.
- Regularly prune away those lower side shoots.
