Skip to content

Box elder · Acer negundo

Why are my box elder leaf tips turning brown?

Brown tips on your box elder are a classic sign of dehydration or heat stress. Check the soil moisture and the tree's exposure to harsh afternoon sun.

Not sure it's this? Check a photo of your plant for free

Check these first

  1. Check if the soil is dry more than 3 inches down.
  2. Look at the weather forecast for recent heat waves.
  3. Check if you have applied fertilizer recently.

Likely causes

  1. Drought stress

    Most likely

    How to tell: The edges of the leaves become dry, brittle, and brown. This happens during hot, dry summer weeks.

    What to do: Water the tree deeply once a week during dry spells. Apply 2 to 3 inches of wood mulch around the base to hold moisture in the soil.

  2. Salt buildup

    Possible

    How to tell: Tips turn brown even when the soil feels moist. This often occurs if you use chemical fertilizers too frequently.

    What to do: Flush the soil around the tree with plenty of water to wash away excess salts. Switch to organic compost for future feeding.

Brown tips on other plants

Find out what's wrong with your box elder

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

Download on the App StoreGet it on Google Play

When to worry

A few brown tips during a heat wave are normal for a box elder. Worry if the browning spreads to the entire leaf or causes significant leaf drop.

Stopping it coming back

Mulch the root zone to keep the soil cool and moist. Water deeply during dry periods rather than giving light, frequent sprinkles.

Box elder: brown tips? Check yours with a photo

Every plant is a little different. Take a photo of your box elder and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Download on the App StoreGet it on Google Play

Get the app · Or check it from a photo now, free

Questions people ask

Can I trim off the brown tips?
Yes, you can snip them off with clean scissors for appearance. Just avoid cutting into the green part of the leaf.
Is my tree dying?
Brown tips are usually just a reaction to environment. If the rest of the tree looks green and strong, it is likely fine.

Guides to these causes

More problems with Box elder

Back to the Box elder guide

This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.