Sabal palm — Sebastian, Florida

The sabal palm fits Sebastian because it is a Florida native that UF/IFAS rates cold hardy to about 15°F, far below any freeze recorded in Indian River County's recent winters.

The species carries two common names in Sebastian, sabal and cabbage palm, and both describe Sabal palmetto. UF/IFAS Gardening Solutions notes it was designated the state tree in 1953 and occurs on the Florida state seal. Its wild habitats are pine woodlands, hammocks and river banks, which is the same kind of ground found along the St. Sebastian River and in the coastal hammock at Sebastian Inlet State Park.

Size explains why it suits a quarter-acre lot in the Sebastian Highlands. A mature sabal has a trunk 10 to 16 inches thick that grows to 40 feet tall, topped by fan leaves with blades 3 to 4 feet long (UF/IFAS ST575). The palm flowers in late spring with thousands of small cream flowers that attract bees, then sets black fruit about a quarter inch across in late summer, which raccoons and birds eat and spread.

Salt is the one real limit near the Indian River Lagoon. ST575 rates the sabal fairly tolerant of spray on its leaves but intolerant of salt in the root zone, so a lot on Indian River Drive that takes lagoon water over the seawall in a surge is a harder site than a lot west of U.S. 1.

A sabal grown from seed in Sebastian is a decades-long project: UF/IFAS reports seedlings can take 15 to 30 years to form a visible trunk under natural conditions.

Germination itself is quick. With steady moisture and heat of 86°F to 95°F, germination can occur in as few as 18 days, with 50% of final germination occurring within 33 days (UF/IFAS ST575). The seedlings look like grass at first, and each new leaf adds a segment. That explains the volunteer sabals that come up under oaks and fence lines across Sebastian: birds drop the seed, and the young palms sit trunkless for years.

Once a trunk forms, early elongation can reach about 6 inches a year, then slows to less than an inch a year as the palm matures, the same fact sheet reports. A sabal with a tall clear trunk in a Sebastian yard is therefore usually an old palm, which is one reason the City of Sebastian treats tall sabals differently from other palms (see the city rules below).

Most transplanted sabals that die in Sebastian yards die of drought in their first year, because a dug sabal loses its roots and lives on water stored in its trunk until new roots grow.

The root biology of a sabal bound for a Sebastian yard is unusual. When roots of Sabal palmetto were cut in UF/IFAS experiments, virtually all cut roots died back to the trunk and were replaced by new roots from the root initiation zone at the base (UF/IFAS EP001). It can take 8 months or longer to produce a new root system in this species, and palms with less than 10 feet of trunk appear to have insufficient water storage capacity to carry themselves through that period (UF/IFAS ST575).

Leaf removal at digging helps a sabal survive the move to Sebastian. In research reported by ST575, removing all leaves increased survival rate to 95%, compared to 64% for those transplanted with a third of their leaves left on. That practice is called cropping. UF/IFAS EP543 separates it from hurricane cutting, which it describes as a drastic, damaging pruning process mistakenly carried out to reduce wind loading in palms.

Regenerated sabals are the alternative to a bare cropped trunk. After digging, the root balls are wrapped in black plastic, held on irrigated racks for six to eight weeks and then grown in the ground for eight or more months before sale, EP543 explains. Under the Florida Grades and Standards it cites, Florida Fancy regenerated palms must have at least four healthy leaves, while Florida #1 should have at least three healthy leaves. EP543 puts transplant losses as high as 50% in part on irrigation failure, dry spells, saturated soils and deep planting, all conditions a Sebastian installer controls. A cropped sabal can take as many as two years to grow back a full, rounded crown.

Four problems kill sabals in Indian River County: the palmetto weevil, Ganoderma butt rot, Thielaviopsis trunk rot and lethal bronzing, according to UF/IFAS.

The palmetto weevil is closely associated with the cabbage palmetto, and stressed or newly moved palms draw it in (UF/IFAS IN139). Transplanted sabal palms are particularly attractive to this pest, which burrows into leaf bases and lays its eggs, and the larvae can destroy the bud (ST575). A new sabal in a Sebastian yard that is kept watered through its first summer is less of a target.

Ganoderma butt rot lives in the soil and decays the lower 3 to 4 feet of the trunk. ST575 states wilt appears after about 80% to 90% of the trunk cross-section has rotted, and there is no control. UF/IFAS PP100 explains how its shelf-like conks spread spores. Thielaviopsis trunk rot needs a wound in the upper trunk to enter, which is why climbing spikes and rough handling of a new Sebastian transplant matter.

Lethal bronzing is the newest threat. The phytoplasma behind it was isolated from cabbage palm in 2008, and Indian River County is on the confirmed list (UF/IFAS PP163). UF/IFAS Gardening Solutions states that lethal bronzing disease (LBD) is fatal in palms once the symptoms are seen, so a sabal in Sebastian that drops all its fruit early and browns from the oldest leaves up warrants a test, not pruning.

Sabals in Sebastian are fed three times a year with an 8-2-12-4Mg controlled release palm fertilizer, inside the Sebastian city fertilizer rules, and trimmed only of fully dead fronds.

ST575 states that sabal palms should be fertilized three times per year (four times in south Florida), with 100 percent of the nitrogen, potassium and magnesium in controlled release form, manganese as sulfate and iron as sulfate or chelate. If the lawn around a sabal is fertilized, the fact sheet calls for the same product on the turf, because high nitrogen lawn blends can cause magnesium deficiency in the palm. In Sebastian those applications also fall under the city ordinance: Section 50-5 of the city code states fertilizer shall not be applied within ten feet of any pond, stream, watercourse, lake, canal or wetland or from the top of a seawall, a rule that reaches every sabal on a canal lot off the St. Sebastian River.

The number of green fronds on a sabal is a reading of its potassium supply. ST575 explains that potassium deficiency causes early leaf loss and that the palm pulls potassium out of its oldest leaves, so yellowed but living fronds should stay on. Once a frond is fully dead it can be cut a few inches from the trunk, leaving the split leaf bases that Sebastian residents call boots. Some sabals keep their boots for decades and others shed them after a couple of years, a difference ST575 says may be genetic.

Free diagnosis is close by. The IRC Master Gardener Program lists a plant clinic at the North IRC Library, 1001 Sebastian Blvd., on Wednesdays from 10:00 a.m. to 12:00 p.m., where volunteers trained by UF/IFAS Extension Indian River County answer palm questions.

The City of Sebastian classifies a sabal with a clear trunk of 6 feet or more as a specimen tree, so removing one takes a $25 tree removal permit and a city inspection.

The rules come from Article XIV of the land development code, summarized in the city's tree protection brochure dated April 7, 2023. Every other palm is excluded from the specimen category, which makes the sabal the only palm the city protects by size. Permits are issued online through the Building Department or in person at Sebastian City Hall, and staff inspect before and after removal. When palms are planted to meet a lot's tree count, they may make up no more than 35 percent of required trees and need 6 feet of clear wood. The brochure also cites the 2019 state law, CS/HB 1159, that bars local permits for removing a dangerous residential tree documented by a certified arborist or licensed landscape architect.

The city's Natural Resources Board lists cabbage palm among its recommended native canopy trees and states that local residents are eligible to purchase discounted native plants through the Pelican Island Audubon Society. Nursery-grown sabals and other landscape palms also appear among palms and trees on Digital Towns Market. Digital Towns Market is our marketplace.

Last verified: October 10, 2026, on the City of Sebastian website.