I need an organic fertilizer for our young avocado trees. What do you recommend?
Here is a link that will help you.
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-tree-growing.htm
I bought a cold hardy avocado tree from "fastgrowningtrees.com" two years ago with the expectation that it would produce in 1-2 years. It has not produced yet. Should I be concerned? Second question is a large percentage of the branches are pointing toward the ground. Should I trim these back? My instinct says yes, but I thought it wise to check with you.
As long as the trees were grafted ones purchased at a nursery or garden center, then you should be able to get fruit from them. In order to bear fruit, the avocado tree needs pollinators. You might want to consider planting flowers that draw bees and other similar pollinators to encourage your tree to bear more fruit if this is an issue.
Additionally, if you are seeing lots of foliage growth with little to no blooming, then it's likely a nutrient imbalance - too much nitrogen, which produces lush growth and too little phosphorus, which is responsible for flowering and fruiting. Without flowers, you won't get fruit. I would give the tree a high phosphorus fertilizer, or add bone meal to the soil. Here is more information: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm
You can do some judicious pruning, no more than 1/3 of the branches at a time. This article will help with pruning: https://www.gardeningknowhow.com/edible/fruits/avocado/pruning-avocado-trees.htm
My avocado houseplant has a long stem (7 inches) with one leaf at 7", another at 7 3/4" another at 8 1/2" and so on. Can I replant it, burying half the stem? Then prune it where? It's growing well, but too gangly. Help me, please. Thank you,
You may just want to give it a quick trim. This article will help: https://www.gardeningknowhow.com/edible/fruits/avocado/pruning-avocado-trees.htm
Me and my sister live in Iceland and we've been taking care of some avocado seeds (hers has gotten very big), but the leaves look kind of too big and it's like the stalk doesn't really support them anymore. Do you know what to do? Should she cut the biggest leaves off or is there something else to do? Also, I planted mine before she did and mine is very small and the leaves are kind of dry. I water it enough, I think, but it seems to be kinda sad. :( Any advice for us? With best regards Guðbjörg
They may not be receiving enough sunlight.
You can pinch back the plants to promote healthier bushy plants.
Here is a link with more growing information.
https://www.gardeningknowhow.com/edible/fruits/avocado/indoor-avocado-plant-care.htm
I have two avocado trees - 20 ft tall, but no fruit. Any suggestions? They're very healthy looking but I've probably under fertilized. Used the correct stuff, but only a couple times a yr.
You could have a pollination issue as well as fertilizer.
Here are some links to help you pinpoint the issue.
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-pests-and-diseases.htm
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-tree-growing.htm
https://www.gardeningknowhow.com/edible/fruits/avocado/pollinating-avocado-trees.htm
My tree is losing lower leaves but growing taller. Is this normal? Was outside and brought in for winter.
Most likely the change of light conditions has caused your tree to drop some leaves. Increase the light your plant is receiving.
Here is a link with more information.
https://www.gardeningknowhow.com/edible/fruits/avocado/indoor-avocado-plant-care.htm
Is your advice about fertilising in February Northern or Southern Hemisphere related?
If you are growing an Avocado as a houseplant here is a link with care information.
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-houseplant-care.htm
Since most Avocado that are grown outdoors, the care information in the article below would be for warm climates, zones 8-10
The information in the link below would be for an outdoor Avocado in these growing zones.
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-tree-growing.htm
http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=1732