Although relatively slow-growing, needle palms grow to 8 ft. tall by 10 ft. wide at maturity. The ideal planting site for needle palms has moist, well-drained soil, in partial-shade, although it can adapt to full sun. Because of the spreading Amulti-stem growth habit and 4 to 10 inch needle-like spines at the base of the trunk (from which the palm gets its moniker), needle palms should not be planted too close to high traffic areas.
Typically, needle palms do not experience significant nutrient deficiencies, but when supplementing soil nutrients, palms do best when fertilized with specially formulated palm fertilizers. Yellowing fronds or yellow/brown spots on fronds can be indicative of potassium and magnesium nutrient deficiencies. To learn more about palm nutrient requirements click on this link: fertilizing palms.
Pests and diseases
Although not a significant host to major pests, needle palms can be susceptible to the fungal disease Ganoderma. The most noticeable sign of this Ganoderma is a mushroom (aka conk) growing at the base of the palm trunk. Click on the link for more information on Ganoderma.
For more information on Needle Palms, click on this link.