This spring I have noticed that some (not all) of my holly trees seem to be struggling. They are not blossoming like the others and a number of leaves on them are yellowish with little raised black spots. I have read through multiple articles and there is nothing that it seems to match perfectly. Any advice would be greatly appreciated. Thank you.
The yellowing leaves with black spots should be on the leaves closest to the trunk. This is normal, and the tree is getting ready to shed them to be replaced with new growth.
As to the non-blooming, maybe this is just the year they don't want to bloom?
My holly bushes: one female, one male, have straggly branches where there are only leaves at the end of the branches. Can I cut the branches off? Both bushes were damaged by heavy snow storms. I live in the northeast section of the country and it is springtime. Both bushes have small white flowers. Will I kill the bushes by doing some heavy pruning?
Thank you.
Hollies are best pruned just before their flush in the spring. For us, zone 6a/7b, it's mid-March. When pruned before the flush, bare stems are visible for a shorter period of time than when pruned in fall or early winter. When pruning your shrubs, do not take more than half of the plant. Once they have been cut back, a yearly gentle shaping is better than the occasional severe cutting back. You may not have many berries the first year after a harsh trim, but should have an abundance the second year. (It is not too late, don't wait.)
I have a holly bush (male and female) that was severely eaten by deer last winter. Do they grow back well? It still has some branches with leaves on it.
Your hollies have been "pruned". They will grow back, be prepared for this to happen again. Our goats love holly leaves and "prune" every chance they get!
Do female holly bushes have berries year round?
They will normally only get berries if there is a male holly nearby. Here is more information: https://www.gardeningknowhow.com/ornamental/shrubs/holly/how-to-tell-the-difference-between-a-male-and-female-holly-bush.htm
https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-bush-no-berries.htm
Holly bush with berries is a male. My male holly bush doesn't keep it's berries year round, at least mine doesn't - I live in southern Ontario. I also have a female holly bush and in the Spring is has little buds of flowers. At the moment my male holly bush has little white flowers which will eventually turn into berries.
Until wildlife or birds eat them. Or until they become too ripe and fall off.
A few years ago, I purchased and planted 3 holly bushes, 2 female and 1 male, I believe. The 2 females are growing great!!! Getting taller and filling out. The male bush, however, is still the about the same size as it was when I bought it. I can't figure it out.
I would check the roots. There maybe something attacking the roots of the plant that is keeping the plant stunted.
Just as a precaution, treat the plant with neem oil. It will kill pests and fungus, which is also a possibility.
How can I get rid of them? They seem to be stuck like glue. It also has a problem with yellowing leaves that drop off after awhile. Help!
Sounds like scale. These articles should help: https://www.gardeningknowhow.com/ornamental/shrubs/holly/diseases-of-holly-bushes-pests-and-diseases-damaging-holly-bushes.htm
https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm
Yellowing and dropping holly leaves is a normal occurrence in the spring. As new growth flushes, older leaves are released by the plant. Usually about 10% of the foliage will drop.
White bugs on holly bush. What to do?
It sounds like it may be mealy bugs. This article will help:
https://www.gardeningknowhow.com/plant-problems/pests/mealybugs-white-residue-on-plants-leaves.htm