Pruning Date Palms: What to Cut, What to Leave, and Dethorning

The most common mistake we see on backyard date palms isn’t too little pruning. It’s too much. Every green frond is feeding the palm and its fruit. Cut them for looks and you get a palm that looks tidy and fruits poorly. Here is how we prune in our grove, and how to dethorn safely.

What to cut

• Dead and fully brown fronds. They no longer feed the palm and they shelter pests.
• Spent fruit stalks after harvest.
• Fronds that block the fruiting zone enough to make pollination, thinning or harvest impossible, and only those.
• Offshoots you don’t plan to keep, once they compete with the mother. If you want to keep them, see how to remove an offshoot.

What to leave

Leave every healthy green frond you can. Date growers often cite a ratio of roughly eight to ten green leaves for every fruit bunch the palm carries. A palm stripped down to a tuft at the top, sometimes called a “pineapple” or “hurricane” cut, has lost a large part of its food supply, and its fruit shows it.

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Dethorning

Date palm fronds carry long, sharp spines near their base. Around the crown, where you’ll be working during pollination and harvest, those spines are a real injury risk. Dethorning means cutting the spines off the frond bases in that working zone. It doesn’t hurt the palm. We do it after harvest or in winter, so the crown is safe to reach into by the time the spathes appear in spring.

When to prune

After harvest and through winter. In Southern California there is a second reason to wait for cooler months: UC Cooperative Extension advises pruning palms from December through March, when the invasive South American palm weevil is least active, because fresh cuts attract it. See our palm weevil guide.

Staying safe

• Wear heavy leather gloves, long sleeves and eye protection. The spines go through thin gloves easily.
• Clean your saw or pruner between palms so you aren’t carrying disease from one tree to the next.
• Don’t work from an unstable ladder under a heavy crown. Once a palm is tall, hire a crew with the right equipment.
• Cut fronds a few inches out from the trunk rather than gouging into it.

Quick Answers

Should I cut the brown leaves off my date palm? Yes, once they are fully brown. Leave green and partly green fronds.

How often should a date palm be pruned? Once a year is plenty for most palms, after harvest or in winter.

Do I need to trim the old leaf bases on the trunk? No. Trimming them is cosmetic. If you do, don’t cut into the living trunk.

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