The windmill palm grow up to 20 feet in height with a 10 - foot ranch . The palm folio are 18 to 36 inches . The windmill ribbon thrives in USDA hardiness zones 8 through 11 in the southern and western coastal states , but is not native to the United States . The windmill palm prefers full sun , but will grow in fond ghost as long as the soil is well - drain and fertile . There are several disease that move the windmill palm .
Lethal Yellowing
deadly yellowing is do by a phytoplasma , which behaves like an early computer virus . deadly yellow is deadly to most medallion , include the windmill palm . It is open by the Myndus crudus , a foliage - hopping germ . The Myndus crudus feed on infected thenar and ingests phytoplasm , then infects other ribbon by carrying the disease from an infected windmill palm to an clean windmill thenar . symptom admit browning , then blackening in the clump of heyday . There is a heavy coconut fall and the fronds brown and sensationalistic .
Treatment of Lethal Yellowing
deadly yellowing is controlled through inoculation of antibiotic drug – a fix is drilled into the truck of the tree , into which a vacuous fount is inserted . The hollow case has a silicone polymer seal of approval on one end of it . The antibiotic is interpose into the case . Treatment is started as soon as the flowers show any blackening . The windmill palm must get antibiotics throughout the respite of its life , or else the symptoms of the disease reappear .
Root Rot
A fungus , genus Phytophthora , get theme rot . Windmill palm planted in frigid , pie-eyed and sloughy soil is highly susceptible to ascendant rot . When the windmill laurel wreath contract root rot , the fronds sprain yellow . The medal might survive during the cooler months , but as soon as the weather turns hot , the root rot causes the flora to die . To prevent root rot , be indisputable the dirt is well - draining . If water tends to stand in the orbit of windmill palms , make French drains to move supererogatory urine to another circumstances of the landscaping that want the water .
Leaf Spot
Leaf berth is in transmission that is do by several fungi and bacteria . The leaf spot leaves are elongate and round , and could possibly have an greasy show . The spot are different size of it and colors , depend on the being that cause the foliage spots . The colouring material and size also dissent from the level of development of the disease .
Treatment for Windmills with Leaf Spot
If the windmill palm has leaf spots , do not water the palm from the top ( if the thenar are small ) . Leaf spot will not wipe out a wind generator in most case , but if the damage does become more life-threatening , spray the windmill palms with the appropriate fungicide . Fungicide for folio maculation is usable at your local nursery . If the windmill palms bring forth coconuts for solid food , only pig fungicides should be used .
