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Hypericum Red Star "Kolmarest"

Posted by coxy 6 (My Page) on
Sun, Jul 27, 14 at 12:44

The St. John's Wort shrub I planted last year never came back and I wasn't going to try again but came across this variety. Since I just got it and it's late in the flowering stage, it is covered in gorgeous red berries. I have discovered that different forms this shrub also have berries in a few different colors. Now I want to get them all but wonder if they will be any more reliable than the one I had no luck with.


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RE: Hypericum Red Star "Kolmarest"

IME, hypericums are one of the toughest plants on the planet - will tolerate just about any kind of soil except boggy, quite cold hardy, will take both full sun and part shade and, if the gardener so inclined, difficult to kill :-)) So not at all sure why yours would not have survived, unless you experienced the winter from hell last year, as many did.

We sell a great many of these shrubs at my nursery in the full assortment of berry colors. They are just selections of Hypericum x inodorum, so hardy to zone 5 and rust resistant (a big bonus for any St John's wort!). If you like it, I'd try again.


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RE: Hypericum Red Star "Kolmarest"

Thanks! I'm going to do that.


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RE: Hypericum Red Star "Kolmarest"

  • Posted by bboy USDA 8 Sunset 5 WA (My Page) on
    Fri, Aug 1, 14 at 13:43

If the kind you are asking about is an H. x inodorum cultivar you may want to do some more reading about it as I am looking at a generally pretty good seeming print reference that - rightly or wrongly - is indicating USDA 7 for that cross. The one you tried before may also have been a kind that does not come through every Zone 6 winter - or maybe even most of them. A good policy is to assume that commercial sources in particular are rating plants one zone too hardy, so if a plant is rated USDA 6 it may not really be able to last in that zone. (Also if someone is saying a plant is hardy to that zone then really they are saying that is where it is on the borderline of hardiness, with there being failures likely at least a small part of the time).


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RE: Hypericum Red Star "Kolmarest"

  • Posted by dbarron Z6/7 (Oklahoma) (My Page) on
    Fri, Aug 1, 14 at 13:51

I heartily endorse H. frondosum 'Sunburst', the flowers are great, the foliage is semi-evergreen, and it's a native of my area. If you can't find Sunburst, any frondosum is much the same.
I grew it in Oklahoma, in an area where the ground would occassionally flood for a day or two, but it could also become sweltering hot and dry in the late summer. It survived reaching -27F with snow cover one winter.

Here is a link that might be useful: MO Botanical link to Sunburst


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