It’s the middle of summer in Antelope Valley, and the sun is blazing. You’re hanging out in the backyard, soaking up the California sunshine, when you notice that your favorite shade tree has brown leaves. What’s the deal? 

Before you panic and start reaching out to tree services in Quartz Hill, CA, to take down what’s almost certainly a dead tree, realize that you’re not alone. Many local homeowners call us asking, “Why are tree leaves turning brown in the summer?” There’s more than one reason you might notice crispy, discolored leaves on your tree, and not all of them mean it’s a goner.

1. Heat 

What’s the most likely reason for leaves turning brown? Heat. 

Quartz Hill temperatures often reach or exceed 100 degrees. Heat is one of the most common environmental stressors for trees, and when it’s scorching outside, they may start shedding or browning their leaves as a survival move. Removing leaves helps the tree conserve water and energy, allowing it to survive until next year.

2. Not Enough Water — Or Too Much 

Brown leaves can also indicate drought stress. Thirsty roots can’t support the leaves, which will turn brown and fall off. 

But there’s a twist: sometimes, too much water causes brown leaves. Overwatering can suffocate the roots, especially in our clay-heavy soil. If your tree’s leaves are turning brown at the edges but still hanging on, that usually means it’s not happy underground.

To determine whether water is the answer to “Why are tree leaves turning brown?” dig a few inches below the surface. If the soil feels soggy, give it a break. If it’s dry, give the tree a good, long drink. 

3. Sunburn 

Did you know your trees can get a sunburn? It’s called “leaf scorch,” and it results in leaves that are brown with crispy edges. Sunburn is especially common on young or recently pruned trees.

You can protect the tree by applying a layer of mulch around its base. This helps the roots retain moisture and stay cool. 

4. Bugs and Fungal Infections 

If the brown leaves have weird spots, holes, or sticky residue, pests or fungi may be the issue. In Quartz Hill, pest infestations (like aphids and scale insects) are frequent troublemakers. Call an arborist to ID the problem and treat it before it really does kill the tree.

5. Over-Fertilization 

A soil nutrient deficiency can cause brown leaves, but overfeeding the tree can also cause harm. Too much of a good thing can burn the roots or foliage, so space out the feedings and use the correct amount and type of fertilizer to keep the tree healthy.

Keep Calm and Call Tip Top Arborists

Brown tree leaves in summer can mean many things, and most aren’t a death sentence. But if you need a straight answer to “Why are tree leaves turning brown?” call Tip Top Arborists in Quartz Hill, CA, at 661-942-5501. We can answer the trickiest questions (like providing an explanation for a dead tree with green leaves) and help you keep your trees looking their best.