Ficus elastica, the rubber fig, rubber bush, rubber tree, rubber plant, or Indian rubber bush, Indian rubber tree, is a species of plant in the fig genus, native to eastern parts of South Asia and Southeast Asia. It has become naturalized in Sri Lanka, the West Indies, and the US State of Florida.
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In the summer I water mine thoroughly even 7 days. In the winter it’s every 10-14 days because the sun can be out every day here in the Sonoran Desert. You’ll have to adjust the watering frequency according to your growing conditions. Houseplant watering 101 will shed some light on factors to consider. You basically want a happy medium with this plant – not bone dry but not soggy wet.
As I say in regards to houseplants: if your home is comfortable for you, then it’ll be the same for your plants.
I use worm compost & compost to feed all my houseplants in early spring. Worm compost is my favourite amendment & am currently using Worm Gold Plus. You want to apply these sparingly indoors; easy does it.
If combos aren’t your thing, you might prefer a balanced liquid organic fertilizer. You can use this 1 outdoors too so when it comes to your houseplants, dilute it to half strength. Use this in spring & maybe again in late summer but don’t overdo it because too much fertilizer causes burn.