Is it the female plant that produces berries? Does it do best in full sun,partial shade, full shade?
Most Holly shrubs and trees are fully hardy down to zone 6. Since you are on that thin line of hardiness, I would recommend pulling toward the cold hardy cultivars, just in case.
This article will help you to choose a holly that will definitely do well in your area: https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-5/holly-shrubs-for-zone-5.htm
Holly bushes and small trees do best in partial shade, 4-6 hours of sun daily. They prefer acidic soil which may be an issue for Ohio growers. The female holly produces berries; a male holly needs to be nearby, within 50 feet or so, to pollinate the female flowers and start berry production. In plant nurseries, hollies are usually sold as either male or female. American, Dahoon, inkberry and winterberry, are popular hollies for your zone. Provided are two links: one to some of the hollies for zone 5-9 although the list is not exhaustive. https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-5/holly-shrubs-for-zone-5.htm
and this link to how to grow and care for holly: https://www.gardeningknowhow.com/ornamental/shrubs/holly/growing-holly-bushes.htm
I don’t know if that’s infestation? We have male and female and that mini grapes are in both bushes. Last summer My holly bushes had the black powder and treated with neim oil, It was great. Thank you.
Those are the flowers! Here are some articles that will help you:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/when-does-holly-bloom-fruit.htm
The holly bush has grown to approx. 2 feet above fence height. Could it block the light of two well established pear trees to the point of killing them?
It is unlikely that a bush form holly will grow tall enough to block light of a fruit tree, as they will quickly outgrow a Holly. There is more of a likelihood of the roots causing an issue though. If they are too close, then they could be preventing the pear tree from growing properly, which could result in their death.
Have several holly trees but no berries. Does this mean they are all male? If I buy a female and plant amongst them, will I get berries?
Adding male hollies nearby will certainly increase your chances of berries. But lacking males isn't the only reason you might not have berries. Here are more reasons:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-bush-no-berries.htm
https://www.gardeningknowhow.com/ornamental/shrubs/holly/growing-holly-bushes.htm
I purchased approximately 30 Blue Maid Hollies and planted them last of Spring 2019, this year they’re starting to blossom but I noticed about 10 of them are a lighter green and the rest are a nice rich blue green. Did I get tricked and sold different hollys? Or are they all the same just not getting the same nutrients?
It is most likely a nutrient issue, namely Iron. They may be lacking the nitrogen necessary, or the pH of the soil could be too high, as well.
These articles will help:https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-yellow-leaves.htm
https://www.gardeningknowhow.com/ornamental/shrubs/holly/growing-holly-bushes.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
I have a Holly Bush in my garden and I noticed that it has red berries on it just now April 2020 is this normal The bush has been in the garden for a few years and last year it was cut back as getting too big
Yes. Hollies, with the exception of Ilex vomitoria and a few others, will have red berries as long as it is female. Males only produce pollen, and no berries.
This article will help:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/growing-holly-bushes.htm
e of it no sprays have been used
Unfortunately, your photo did not come through. It sounds like damage from something having been sprayed on it.
This article will help:
https://www.gardeningknowhow.com/ornamental/trees/tgen/herbicide-tree-injury.htm