i planted a 12" guava last year. it's now 6' tall. when will it start producing fruit.?
Most Guava Trees start producing fruit in their 3rd year, either from seed or grafted.
Optimum care is needed, though to produce a healthy fruiting tree.
https://www.gardeningknowhow.com/edible/fruits/guava/growing-guava-fruit-trees.htm
CAn I prune when tree is bearing and how much can I cut back to shape the tree?
These articles will help you.
https://www.gardeningknowhow.com/edible/fruits/guava/growing-guava-fruit-trees.htm
http://edis.ifas.ufl.edu/mg045
When is best, and how to move a small guava tree
During fall or dormancy for the best chance; my research shows this tree can be difficult to transplant.
Dig a much of the root ball as possible.
https://www.gardeningknowhow.com/edible/fruits/guava/growing-guava-fruit-trees.htm
What are the hard, black spots appearing on the guava fruit skin?
This could be something calle algal leaf spot caused by Cephaleuros virescence. The spots can appear on both leaves and fruit.
There are some other possibilities. Please see this article for advice:
Are there any treatments of the disease? The disease produces a whitish cotton like spores that covers the fruits, tender leafs, and also affect any lesion on the bark.
I would suggest wettable sufur, or neem oil. I have also had success with something from Foxfarm called Force of Nature miticide... Not only does it control mites, but the garlic in it is an antifungal. This is an organic treatment but keep it out of your eyes. IT BURNS! haha.
Hi, How to increase the leaves in Guava fruit tree. Best wishes.
This is usually caused by a lack of nitrogen in the soil. Adding this can help vegetative leaf growth in your tree.
Alternatively, the soil pH might be a bit off. Dolomitic lime will, usually, correct this if adding nitrogen does not fix the problem.
Here is an article on the care of the tree: https://www.gardeningknowhow.com/edible/fruits/guava/growing-guava-fruit-trees.htm
How,much fertilizer 20-20-20 TO GIVE TO GUAVA TREES IN A POTS (3 Years old)? Or if there is any better fertilizer? Thanks in advance.
Normally I would alway say that it is always best to follow the fertilization guide on the container, as every manufacturer will have a different feed ratio. In this case, for that high concentration I would use only 1/4 that strength once a month. The best fertilizers on the market are extremely expensive, and are not necessary for this case. The best that I am aware of will run you around $350 USD for a box, so you can see that it may not be the most efficient way to grow a single tree in a pot.
The only thing else I would say would be to add a little calcium and magnesium to this. Dolomitic lime will provide this, as well as keeping the soil pH balanced.
This article will give you more information on growing these: https://www.gardeningknowhow.com/edible/fruits/guava/growing-guava-fruit-trees.htm