Hi James.

I'm in a different climate than you are but, in my research, and growing of this plant, I've discovered that winterberry plants, once established, are not all that particular about soil type or wet conditions.

I grow them on very poor sandy soil with low ph but I do water when it gets dry.

According to MBG:

'Easily grown in average, acidic, medium to wet soils in full sun to part shade. Adaptable to both light and heavy soils, but prefers moist, acidic, organic loams. Good tolerance for poorly drained soils including wet boggy or swampy conditions.'

Southern Gentleman is not the pollinator for all Ilex verticillata. Make sure you choose the right pollinator for the female.

Good point lv.

I wondered too if winter red would be the best choice in a z7 area, being it's one of the latest blooming of the winter berries.

Southern gentleman is the correct pollinator for winter red btw, but there may be earlier blooming choices that would be better for James' location which would require a different variety of pollinator.

ETA: Pollination chart for winterberry:

I've grown winterberry at a couple houses, and they're easy and carefree. Once established they are not fussy about soil as long as its not dry-dry.

I did buy 3 winter red winterberry. Been in the pots for too long. Hoping to get them in the ground this week. Curious how wide they tend to get since they’ll be on the property line I want to keep them the right amount of feet off it.

Mature height = 6-8'

Mature width = 6-8'

Under good growing conditions winterberry will sucker and produce a colony.

Looking great! Can’t wait for them to fill in creating a hedge

Beautiful crop of berries for such young plants.

Just for what it's worth James.

I did some 'structure' pruning on my winter berries in February a couple of years ago.

There was a lot of new growth that came in the spring but many of the new branches did not bear much fruit (berries) if any.

reading through the thread linked below, NHBabs addresses this:

'Here's a great example of how NOT to prune winterberry. These are part of a commercial planting surrounding a parking lot. "One size fits all" pruning rules the day. No one will ever express "beautiful!" about these shrubs, notice the modest smattering of berries on the top. My experience is that Ilex verticillata requires very little pruning, perhaps an occasional stem becomes top heavy and falls over, in which case it can be removed from the bottom and used for decoration. Shearing like this in pic greatly reduces berry production.'

Just thought I give you a heads up, so you don't make the same mistake I did.

https://www.gardenweb.com/discussions/5841440/winterberry-best-berry-producing-cultivar#n=47

Thanks bill! I have some at my job that get trimmed but they are way too big for the area they are in next to the sidewalk. I don’t pm on trimming these. Ideally I’d like full bushes which pruning can help. But I’ll let them do their thing for the time being. I see them along Pennsylvania roadways in the wild and they look great !