Should I cut off the brown fronds?

Everything below the 9-and-3 line can come off, brown or green, with the dead fronds and spent stalks. Above the line, leave them, even when they yellow, because the palm is still drawing nutrients from them.

Can a brown palm be saved?

It depends on the cause. A hungry or cold-damaged palm usually grows out of it with the right care. A palm with lethal bronzing cannot be cured, and the goal becomes protecting the palms around it. A test tells you which one you have.

Palm and tree questions

Why is my palm tree turning brown?

A palm browning from its oldest, lowest fronds is often late potassium deficiency or cold damage, and those palms usually recover with care. Reddish-bronze fronds that start at the bottom and climb, especially after fruit and flowers drop, can be lethal bronzing, and only a lab test confirms it.

Reviewed by Jeff Kaulbars, ISA Certified Arborist FL-10118A, Ptolemy Inc.

Where the brown starts matters

One or two of the oldest fronds browning and hanging is normal. A palm sheds its oldest fronds as it grows new ones.

Browning spread across the lower canopy, with frizzled, spotted tips, points to potassium deficiency in its late stage. It is the most common palm deficiency in Florida.

Browning on one side of a frond, with a stripe down the frond stem, is a reason to stop and test. It can be Fusarium wilt, which looks the same as a non-fatal leaf-stem blight. Only a lab culture tells them apart.

The color that matters most

Lethal bronzing turns the oldest fronds a reddish bronze, not yellow and not gray, and they droop. It usually starts with fruit and flowers dropping early. The bronze climbs the canopy, the crown thins, and the spear leaf in the center collapses. When the spear goes, the palm is dead.

Lethal bronzing is spread palm to palm by a small planthopper. A palm can carry it for months before it shows, and the whole time it feeds the insect. That is why a palm that comes down without a test can leave the disease behind for the palm next to it.

After a cold snap

Cold can brown fronds across the whole canopy. Leave cold-damaged fronds on until the cold season passes, and wait for new growth before judging the palm. A storm-damaged palm that is structurally intact deserves at least 6 months before anyone writes it off.

Also asked

Should I cut off the brown fronds?: Everything below the 9-and-3 line can come off, brown or green, with the dead fronds and spent stalks. Above the line, leave them, even when they yellow, because the palm is still drawing nutrients from them.
Can a brown palm be saved?: It depends on the cause. A hungry or cold-damaged palm usually grows out of it with the right care. A palm with lethal bronzing cannot be cured, and the goal becomes protecting the palms around it. A test tells you which one you have.

Sources: UF/IFAS EDIS EP269 and EP263; UF/IFAS EP465 (hurricane-damaged palms); our lethal bronzing guide and its sources.