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Mar 12, 2017 10:01 AM CST
|I have been growing two avocado plants indoors for the past two years and recently, they have developed a orange/rust looking film on the side of the pot. Can anyone help me and tell me why this is happening? They are in glass containers (and have out grown them I have been meaning to replant them for a while now but want to eradicate this film before hand?) and sit in the light for the majority of the day. Overwatering is most likely not the issue, but I am open to any suggestions. Attached is an image of the film around the rim of the pot.
Mar 12, 2017 10:04 AM CST
|Hard water deposits would be my first guess.|
Mar 12, 2017 10:05 AM CST
|A mineral deposit, perhaps?
Name: Will Creed
Professional indoor plant consultan
Mar 12, 2017 2:48 PM CST
|Those are mineral deposits. Hard water, poor soil quality and over fertilizing are the likely sources. If your water is hard, use filtered, distilled or rain water. Indoor plants use nutrients (minerals) in very minute quantities so using compost or outdoor potting soils may add excess mineral salts to the mix. If you are fertilizing, stop.
There is nothing in the photo that suggest that your plant needs repotting.
Scrape off the mineral deposits and make the appropriate adjustments.
Horticultural Help, NYC
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