How to fertilize palms correctly

If you do only one thing for your palms, fertilize them correctly. Our fast-draining sandy soils hold very few nutrients, so palms here are chronically prone to the deficiencies that cause yellowing, spotting, and frizzled growth. The right fertilizer program prevents almost all of it.

Fertilizing palms is not complicated, but the details genuinely matter — the wrong formula or the wrong method can do more harm than good. Here is how to feed your palms correctly in Palm Beach County so they stay full, green, and healthy.

Use a true palm-special formula

The most important choice is the fertilizer itself. Palms need a formula designed specifically for them, typically an 8-2-12 with about 4 percent magnesium and a full package of micronutrients including manganese and iron. This balance addresses the exact deficiencies our soils create.

Avoid generic lawn fertilizers near palms — they are high in nitrogen and low in potassium, which is the opposite of what a palm needs and can actually trigger deficiencies. The bag should say it is formulated for palms; if it does not, it is the wrong product.

Insist on slow-release

A quality palm fertilizer should be controlled- or slow-release, meaning the nutrients are coated to feed the palm gradually over months. This matters enormously in sandy soil, where a fast-release product simply washes through and past the roots with the next rain.

Slow-release feeding gives the palm a steady supply and prevents the boom-and-bust cycle that stresses it. It is the difference between nutrients reaching the roots and nutrients running off into the water table.

Time it through the growing season

Feed palms during the active growing season, roughly spring through early fall, when they can actually use the nutrients. A common approach is three to four applications a year, spaced evenly across the warm months.

Ease off as the cooler, slower months arrive, since a palm growing little has little use for a fresh dose. Consistent, well-timed feeding through the season is far better than one heavy application.

Spread it under the whole canopy

Palms feed through a wide root zone, so broadcast the fertilizer evenly over the soil out to and beyond the edge of the canopy, not in a tight ring at the trunk. The feeder roots extend well past the base, and that is where the nutrients need to land.

Spreading widely also helps the product reach roots before it leaches away. Aim for even coverage across the root zone rather than a concentrated pile in one spot.

Keep it off the trunk

Never pile fertilizer directly against the palm's trunk. Concentrated fertilizer at the base can burn the trunk and the roots closest to it, and it does nothing useful since few feeder roots are right there anyway.

Leave a clear gap of several inches around the trunk and water the fertilizer in after applying. That simple watering moves the nutrients down into the root zone and reduces any risk of burn.

Mind nearby lawn and beds

Be aware of what you are feeding around your palms. High-nitrogen lawn fertilizer applied right up to a palm can induce the very potassium and magnesium deficiencies you are trying to avoid, so it is worth keeping lawn feed back from the palm's root zone.

Where palms grow in or near turf, using the palm-special product across the whole area is often the simplest way to keep everyone fed correctly. The goal is to avoid working against yourself with two conflicting fertilizers.

Be patient with recovery

If you are feeding a palm back to health, know that palms recover slowly. New, healthy fronds replace damaged ones over many months, and the older affected fronds will not turn green again, so resist the urge to cut them off while they are still feeding the palm.

Stick with the program and the palm will steadily improve from the crown outward. If you want help choosing the right product or setting a schedule, we stock proper palm fertilizer and are glad to advise at the nursery.

Frequently asked questions