If you notice the leaves on your magnolia tree starting to turn brown, it’s a clear sign your plant is feeling a bit under the weather. There are a few different culprits behind this—ranging from a simple late spring frost to more serious underlying issues—so you’ll definitely want to do some detective work to get your tree back on track.
Is it in the wrong spot?
To really thrive, magnolias need plenty of sunlight. But here’s the kicker: the soil is just as important. Magnolias crave acidic soil. If your soil is neutral or (even worse) alkaline, your tree will struggle to soak up the nutrients it needs. If you suspect your soil isn’t acidic enough, try mixing in some rhododendron soil or peat-free acidifying compost to give it that boost it needs.
Are the leaf edges turning brown?
If you notice the browning starting at the outer edges of the leaves and working its way in, you’re likely looking at a potassium deficiency. In this case, a potassium-rich fertilizer (like potash) is your best friend to help the tree recover its strength.
To recap, the most common reasons for brown magnolia leaves are:
- Soil that isn’t acidic enough
- A lack of potassium
- Late spring frost damage
