25+ Brown Spots On Rubber Plant Leaves. Rubber trees planted in heavily alkaline soil are more susceptible to potassium deficiency. Feed rubber trees once a month during the active growing period with a 3:1:2 or similar rate fertilizer diluted.
Keep in mind that it might be perfectly natural for the lower leaves on your plant to first turn pale yellow, then turn brown and drop.
Feed rubber trees once a month during the active growing period with a 3:1:2 or similar rate fertilizer diluted. In todays video, we will look into top 5 reasons for plant leaf drying and getting brown at tips and edges with diagnosing and treating a common plant. Especially on spots that were already browned. Curling leaves on rubber tree plants are usually indicative of too little water.