Silk floss trees, often called a kapok tree, are a tropical tree that grows in U.S. Department of Agriculture (USDA) hardiness zones 9b through 11. The silk floss tree produces seed pods that are the source of kapok fiber. This fiber is a popular natural floss used in pillows, mattresses and furniture. Silk floss trees can easily reach 50 feet in height and 55 feet in spread. Fertilizing your silk floss tree is not difficult.
Dilute your liquid organic fertilizer for your silk floss tree in a bucket or watering can as directed on the packaging. Liquid fertilizers like kelp emulsion or fish emulsion are good liquid organic fertilizers. Different manufacturers will have different dilution recommendations. Mix enough to thoroughly soak the base of your silk floss tree.
Pour the diluted liquid fertilizer around the base of your silk floss tree once a month.
Loosen the top 4 to 6 inches of soil under your silk floss tree with a shovel every two to three years.
Mix an inch or two of composted manure or worm casings with the soil under your silk floss tree.
Mix the loosened soil and composted manure and worm casings with the soil under your silk floss tree.
Water your silk floss tree thoroughly to encourage the nutrients to soak down through the soil.