Crepe Myrtle Sudden Decline: Fertilizer, Water, or Winter Injury?

Evaluating the 10-Year-Old Tree

No blooms, brown leaves, brittle wood after fall pruning in Sacramento suggests:

• Lawn fertilizer herbicide damage—"weed and feed" products kill tree roots.
• Over/underwatering from lawn irrigation.
• Winter injury—pruning stimulated tender growth killed by frost.

Diagnostic Steps

1. Scratch bark on branches—green = alive; brown = dead.
2. Prune back to green wood—remove all dead tissue.
3. Check lawn products used—avoid granular herbicides near tree.

Recovery Plan

• Water deeply, infrequently (not on lawn schedule).
• Fertilize with tree-specific 10-10-10, not lawn food.
• Mulch ring to eliminate grass competition.

When to Remove

If no green cambium found after pruning to main trunk, replace with a well-adapted variety.