Light. Grow it in full sun. It also tolerates light shade.
Water. Water regularly until established. After that it is highly drought tolerant, though plants in extremely dry soil can suffer in long droughts.
Soil and feeding. It grows in sand, clay, loam and limestone, acidic or alkaline, as long as the soil drains well. It prefers some organic matter but still grows reasonably well in poor soil.
Size. Usually 15–20 ft, growing slowly. Old palms can reach 20–35 ft.
Pruning. Little pruning is needed.
Problems to watch. No pests or diseases are of major concern. It does not tolerate long flooding by salt or brackish water.
Good to know. A Florida native of the Keys, listed as endangered in Florida. It handles salt wind well, suiting seaside yards. It is a larval host for the monk skipper butterfly.
Sources: UF/IFAS EDIS ST628: Thrinax morrisii, Key Thatch Palm · Natives for Your Neighborhood (Institute for Regional Conservation): Leucothrinax morrisii
