Question
I have an avocado tree in my house in a vase with nothing but water because that's how I started the tree off. It's been doing pretty well but I am noticing the bottom of the leaves turn brown. It's not that tall, maybe 9 1/2 in and eight leaves. I've been trying for about three years now and this is like my fifth plant now so I just want HELP please. Thanks, Ryan

Answer
Hi Ryan,

There are many possible cause for loss of lower leaves, although a certain amount of lower leaf loss is normal. Here are some things you should know for growing Avocados successfully.

First, you should move your Avocado to a pot that is just large enough to accommodate the roots and the pit, if it is still attached. Use a soilless, peat-based potting mix that barely covers the roots. It is fine for the upper portion of the pit to remain uncovered.

Avocados need lots of sunlight so put it on your sunniest windowsill. Keep temperatures above 65 degrees at all times and keep the avocado out of cold drafts.

Avocados need soil that never gets too dry. It is best to water thoroughly and then wait until the top half-inch of soil feels dry before watering thoroughly again. Don't keep the soil constantly wet, however. If your plant is in a large pot, you must be careful not to over water because all the excess soil will retain water for a long time and the risk of root rot is greater in a large pot. When you find that your avocado is drying out enough to need water every two to three days, then it may be time to move it into a pot one size larger.

If you use a soilless mix, then fertilize at half strength monthly.

Check the undersides of leaves regularly for signs of spider mites. These tiny critters appear as little specks of dust. Treat them with a spray solution of soap and water.

Avocados are fast growers that tend to grow straight up without branches. To encourage a fuller plant with sideshoots, you must pinch off new leaves as they emerge. It is better to start this pinching before the plant gets tall and leggy looking.

Finally, avocados benefit from raised humidity.

Please let me know if any of this is unclear or if you have any additional questions. If you would like to e-mail some photos to my address below, I may be able to provide some additional insights.

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Regards,
Will Creed, Interior Landscaper
Horticultural Help, NYC

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