I received a holly bush for Christmas and can't plant until spring. Live in Atlantic Canada with harsh winters. What do I do with it until then?
As long as the plant is not too large for the container it's currently in and if you keep it located in a sheltered location, the shrub should be fine as is for spring planting. Though hollies are quite hardy, should you expect unusally cold weather conditions, you may want to give it some added protection (since container plants tend to be more susceptible to cold) by insulating the pot with bubble wrap (or something similar). Also, make sure that it does not dry out completely. It should receive adequate moisture through winter precip, but if it hasn't rained (or snowed) in awhile, give it some water at least once or twice monthly. For more help with caring for hollies once planted, this article will help: https://www.gardeningknowhow.com/ornamental/shrubs/holly/growing-holly-bushes.htm
I have kept a very healthy holly bush in a planter for 2 years. We have recently moved and I have noticed that a number of leaves are turning red around the edges and then falling off. Is it due to the move or extemely cold we have experienced? Please could you advise what I can do, as the tree has a very sentimental value to my family and we would hate to lose it.
I would check for pests, in particular mites. They will be very small and will be on the underside of the leaves. You may also see webbing and that is from the mites. This article will help with treatment: https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm
I have a couple of Ilex X Meserveae "Berri Magic" holly bushes. When is the best time to prune them?
Holly bushes are usually pruned in winter. This article should help you with that: https://www.gardeningknowhow.com/ornamental/shrubs/holly/trimming-holly-bushes-how-to-prune-holly-bushes.htm
I have two very healthy holly bushes but no red berries.
They are probably both the same sex. This article will explain more:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-bush-no-berries.htm
I have what appears to be a perfectly healthy Carrissa holly (there are no spots on the leaves) which is dropping its leaves. It is 1/3 the size (it was a 7 gallon shrub) that it was when it was planted in October. What should I do to help it? There are four holly shrubs next to it and I don't want to lose them as well. Thanks!
It sounds like a fungus. Treat the plants with fungicide and see if this helps.
I want to take my holly from 8 feet tall to about 2 feet tall. Can I prune back to the knots in joints and cut there, and should I cover the cut with paint to stop the sap from leaking?
Cutting the bush back by that much in one season will likely kill it. You should not cut away more than 1/3 in any one year. Cut away 1/3 this year and 1/3 next year and so on until the bush is to the desirable size. You can cut back to the knots, this is fine. You do not need to paint anything on the wounds to stop the sap. Painting the wounds can actually harm the plant by trapping harmful pathogens in the wound. The sap running a bit serves to help wash out any harmful fungus or bacteria that may have gotten in the wound and when the sap dries, it self-seals the wound to protect it.
I have two standard hollies in pots. One has started to develop a black sooty deposit on some of its leaves which easily wipes off. No insect pests are visible. Is this likely to be terminal?
It sounds like sooty mold, which is a symptom of several kinds of pests that can attack hollies. I recommend treating the plants with neem oil. This will kill any pests on the plant and treat the sooty mold as well. This article will help: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm