What makes the guave leaves edges brown like this. Is it cold or any thing else?
It definitely could be the cold, as anything below freezing will start to make it show signs of damage. If this hasn't been the case, then My next guess would be a fungal infection. If it has been very wet lately, then this could be even more possible.
If you think it is likely the latter, then you can apply wettable sulfur to the soil, and it can help clear it up. If it is cold lately, then you can possibly wrap the tree in burlap on those nights.
Here is an article with more information on the care of the tree: https://www.gardeningknowhow.com/edible/fruits/guava/growing-guava-fruit-trees.htm
My tree is dropping the fruit but they are still hard. Is this normal?
This can be due to a few things. This website will give you a list of reasons for this to happen: http://www.weekendgardener.co.nz/Ask-an-Expert/Falling-feijoa/
This article will guide you on the care of these trees: https://www.gardeningknowhow.com/edible/fruits/pineapple-guava/feijoa-pineapple-guava-info.htm
Hi I plant guava seedlings I don't know why after it reach about 6 month it collapse without reason (I mean I don't know). If you can help it will be appreciated
Light and watering are the most likely issues.
Light: Full sun. Move your sprouted guava to a very sunny place as soon as possible. During summer, move outside to a sunny patio. In the winter, move inside to the brightest location possible.
Water: Provide regular water during the growing season, and reduce watering during the winter.
Soil: A rich typical potting mix will do fine. Good drainage is important to protect the roots.
Fertilizer: Feed with a weak liquid fertilizer throughout the growing season.
https://www.gardeningknowhow.com/edible/fruits/guava/growing-guava-fruit-trees.htm
Hi, I have some guava plants seedlings in a green house. I noticed this kind of ants (I dont know) it is yellow color about half inch with long long legs. It will now stick with any thing. with this (ants) I have white dots over the leaves but when I move the leaves it started to fly. I uses some organic matters but no result. it been reduced a little and then come back after 3-4 days. What is this ants and how to treat bot of them. they killed a lot of plant as I think. Thank in advance for your great help. Best wishes.
There are many ways to keep insects off of your trees and plants. This collections of articles will help: https://www.gardeningknowhow.com/special/organic
Help!!! New tree, 3 feet tall. Moved to plant room (grow lights and windows) when outside temps dipped into 40s at night. It started to drop leaves after being brought in. No spots or weird stuff on leaves, not over watered, good potting mix. Is it just getting used to being indoors? Starting to look leggy. What can I try?
Changing the environment too much at once will cause this. Depending on the power of your lights, and how far away they are, you will want to mimic the sun as much as possible. This will require 200 actual watts or greater. If you have a PAR or Lux meter, this should measure around 300 to 500 PAR or 3000 to 15000 LUX. It sounds like the plant is in shock.
Another thing to consider is your soil. If the soil has too much nutrients in it, then it will burn up any seedling you put in there. It is necessary to use a light mix for germination.
Brought new 3 foot guava tree indoors for winter, grew great outside for Summer. I fertilized it with a dash of iron and some all purpose Algo-Flash. Leaves started dropping a week later. Now the edges are turning brown and dropping 3-4 a day. Should I try to rinse it by letting water run through it for an hour or 2 to drain out the bottom, or should I remove it from the pot and replace the potting soil with new potting mix? Which would be less traumatic for the plant? Even new shoots are turning brown and falling off.
Leaching the excess fertilizer with water is less traumatic than re-potting at this point, which would cause some root loss.
I don't think you need to run water through for an hour or two, just water heavily a time or two and hope it refoliates.
I'm not familiar with Agloflash and I can't find a list of ingredients, but I prefer a slow release organic fertilizer over concentrated chemisty, no matter what the claims.
https://www.domyown.com/dr-earth-organic-all-purpose-fertilizer-p-9485.html
Even then, following the directions for application rate is important, guess-work gets your plants in trouble.
Maybe you can identify and suggest a remedy. Please note the three pictures below taken today.
This appears to be "edema", an environmental and physiological disorder related to water uptake and retention, and not a pest or disease issue.
Your case is extreme and rather unsightly, but there is no cure needed or available, except as the following article suggests, soil and water management is important.
https://www.gardeningknowhow.com/plant-problems/environmental/treating-edema-in-plants.htm
http://trecclinic.blogspot.com/2009/11/disease-of-month-physiological.html