I currently have 5 avocado trees no taller than 1 foot. It seems, no matter how hard I try I can't keep them alive past 1 year. The leaves have fallen off all 5 plants. I only water them every 10-14 days. As we speak the soil is comfortably moist. It's so aggravating because I literally can grow anything. Perhaps I'm paying them too much attention?
By Lorelei N.
I can't really tell much from the pictures, but I have a few suggestions. I've had a lot of luck growing avocados indoors in Canada and I'm pretty familiar with some of the problems that you can run into with these plants (e.g., root damage, sciarid flies). Although I can't quite tell what the problem is from the pictures, I have a few suggestions that might help.
First, you should no plant multiple avocado plants together in the same pot. Avocado tree roots like to spread out and do not deal well with crowding. If planted together in the same pot, the plants can strangle one another (untangling them when this happens is horrible, trust me). Planting them together in the same pot can also mean that any diseases are easily transferred between the plants. The pot can also become root bound extremely quickly with multiple plants, meaning that the plants will stop getting adequate water and nutrients in a matter of months. For example, if you put two avocado trees in a pot that is the ideal size for one plant, the pot become root bound in half the time (i.e., 6 months instead of 12); the smaller the pot (or the less soil in the pot) the bigger a problem this becomes. It is best to put each seedling in its own pot that is fill 9/10 with fertilizer.
Second, you need to put the plants in a window that gets a lot of direct sunlight. If the plants don't get enough sunlight, they won't be able to produce enough nutrients to support their leaves (extra fertilizer will not fix this, either). A lack of sunlight can cause the leaves to yellow, then brown and fall off. If you live in a basement or anywhere that doesn't get at least 6 hours of sunlight in the spring and summer, the avocado trees won't last long.
Third, if your plants are on the ground floor directly adjacent to the window, you will eventually end up with sciarid flies. These flies look like fruit flies, but they have black, vein-less wings and kind of aimlessly flutter around the pots. If you can't catch one to examine to check if it is a sciarid fly, breathe on them. Sciarid flies are attracted to carbon dioxide and will fly all around your face when you exhale. The adult flies will munch on any dead leaves that are in the pot and will lay eggs in moist soil. The larvae are what you really need to worry about: after hatching, sciarid larvae eat the roots of the plant. These larvae can be devastating for seedlings. The easiest way to protect against them is to put up sticky fly traps and apple cider vinegar traps to kill the adults, and put a 1-2 inch layer of pebbles in the last 1/10 of your pot. If the adults can't reach the soil, then they can't lay their eggs, and then the larvae can't destroy your plants' roots.
Fourth, avocado trees require a more nitrogen rich fertilizer than most plants. The nitrogen helps support growth. Most fertilizer bags will have three numbers on the front to indicate the percentage of nitrogen, phosphate, and potash. Well-balanced potting soil for indoor plants (considered safe to use on a variety of houseplants) typically has about .2% nitrogen, which is extremely low for an avocado tree. Avocado trees will require something closer to 6% nitrogen to really thrive. Adding fertilizer to your potting soil every month or so can help give your plants the nitrogen they need.
Fifth, avocado trees like fast draining soil; they like it when the soil is moist, but they don't want to be in a puddle. There are a lot of people who suggest putting gravel at the bottom of pots, but DO NOT DO THIS. Avocado tree roots grow down as well as out, and they will seek out areas in the pot that have the most moisture (i.e., the bottom of the pot). In addition to limiting the amount of space the roots have to grow, if you put gravel at the bottom, the roots will very likely wrap themselves around the rocks, making it more likely that you will damage the plant when re-potting. Having drainage holes at the bottom of the pot is fine for draining excess water.
Finally, sometimes you just get a bad seed. Last year I sprouted five avocado trees. One of the sprouts, no matter what I did, would grow a few leaves and then lose them a couple weeks later. It ended up dying after about a year. The other four trees, however, that were grown in identical conditions, are all fine (one of them is more than 4 feet tall). For whatever reason, every now and then you'll get a seed that just doesn't take.
I hope this helps!
Cari
My tree is about three years old and is flowering right now, but is losing leaves from the top down. I have not watered much during the wet months. Is this normal?
By Conor from Los Angeles, CA
My tree is 15 feet high. I planted him from a seed. He had for the first time after 6 years 40 avocados, 2nd time 70, 3d time 90. This year I don't know yet, but he loses a lot of brown leafs. Did I water him too much? Please let me know what I have to do. Thanks.
By Ruth S.
I have three avocado trees. On all three of the trees the leaves and small avocados are all falling off. Does anyone have any idea what the problem could be?
Any suggestions would be greatly appreciated. Please and thank you.Sometimes this is nature's way of getting rid of defective fruit. Make sure you are not overwatering or underwatering.
My potted avocado trees lost all of their leaves, now the new leaves are coming out and dying; the branches turn black. I tried cutting off the black part, but it keeps coming.
Parts of the plants look healthy with new leaves, one flowered this spring.I have grown my avocado tree from a seed and never pruned it. As new leaves sprout the existing leaves fall off.
I still keep the tree indoors. What could I do to prevent the the leaves falling off. Thank you.Brown or dropping leaves can be caused by a number of things so you may have to try several suggestions to find a true solution.
Here is a link to a site that has a lot of information about growing avocado trees indoors. Check all the links on each side for more information.
homeguides.sfgate.com/
I have an avocado tree that I bought when it was about a foot tall. It is now about three feet tall. It is dropping fresh green leaves. I can send pictures, if you want. I bought it in March and it had been doing very well. The lady at Terra greenhouses said not to expect fruit this year, so I'm not, but I am very concerned about it dropping it's fresh green leaves.
Any thoughts or suggestions?
Hello !
I see you get snow in the winter, that means real winter. It also means that the lady at Terra Greenhouses is a big liar if she told you that your avocado has a good chance to have fruits one day. I think that your avocado is just having a big shock due to the change of season, less daylight, heating on in your house which means higher temperature and dry air. It is a situation the plant can't adapt to as an avocado is a tree made to live outdoors where shorter daylight goes together with colder temperature. My advice would be to keep it away from heaters, lightly spray it with water at room temperature once a week and no fertilizer, it is winter it is not the time for a tree to grow and any season of the year water it only if when you press hard the tips of your fingers on the soil no bits of soil stay stuck to your skin and that's all.
My 15 year old avocado tree is losing its leaves too early. It is July in Southern California. It has lots of avocados on it, that are about half way there and the leaves are dropping like it is post season.
They are brown and yellow and hundreds are falling. It is about 25 ft. tall. Why is this happening? What can I do? Am I going to lose this tree?
Recently there was a heatwave where I live. My avocado tree, without my knowledge, was sunburned. All of the leaves turned brown and crunchy so I decided to pluck them off. I left a few that still seemed to be healthy and were green however most of them got knocked off in the wind when I was carrying it outside. Now my avocado tree of only 6 months has three leaves remaining. 
I am concerned that with this minimal amount of leaves my plant will not be obtaining enough sunlight for its vital functions. Currently, it is in a place where it receives sunlight all day that is at a good level. It has some tiny new buds on the top, but they also seem a bit burned, there are also buds where the burned leaves where (both visible, hopefully, in the pictures). Will my tree be OK? I'd hate for it to die as I've grown it from nothing.
Many thanks.
I just planted a new avocado tree in the soil and its leaves started to fall down like it's dying. I mixed the soil with 50gr of DAP fertilizer. I am worrying what should I do?
