My umbrella plant is sick! Please help!?
First of all I wouldn't fertilize more that once a month. Some plants prefer a potting media that is slightly acidic (has a pH under 6-7). Use one of the fertilizers made for Azaleas, Camellias or Gardenias. If you have a plant that has leaves with green veins and yellow coloration in between the veins, you have a plant that isn't getting the iron it needs. This problem is called chlorosis. This problem results when the potting media is so alkaline that the iron isn't available to the plant. Fertilize scheffleras regularly with a gentle organic fertilizer. Plants growing in reduced light will need less frequent fertilization than plants growing in bright light. Coffee grounds make an excellent fertilizer for this plant. Some houseplants are sensitive to chemicals in the water, especially fluoride. Or you might have a salt or fertilizer buildup in the soil, is there a layer of white crystals on the pot? If so try re-potting your plant. If not, your tap water may have too many chemicals in it for the plant. This baby wants bottled water. Your plant seems to want more humidity. Try placing the plant in the kitchen or bathroom to give it more humidity, or place a tray of water with pebbles in it to keep the plant out of the water under the plant. Or try placing a fountain near the plant.
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Definitely over-fertilized. Probably too much or inconsistant watering. Leaf droppage from shock of above abuses. Plant needs lots of light, good air flow, and drainage. Water thoroughly only when dry. Feed only 4 times annually. Live, and let live.
Scheffleras don't like to be over watered. Let the soil dry out a bit between waterings. There's no special fertilizer to use, 10-10-10 is a good general fertilizer. Use a tiny pinch every time you water. Superthrive isn't a good thing to use on a regular basis, it's more for starting new plants. Another thing is that scheffleras need full sun. They're tropical plants.
