St John's Wart St John's Wart I took clippings from my front garden plant in November 2011. I think I have about 12 pots with 2 clippings in them. I see roots coming out of the bottom of the pots already and now shoots spreading all over the surface of the pots. I am going to use them in all my new gardens that we make in the Spring. I always try to start anything that I clip just because. I can't believe how fast they rooted and I'll bet the whole pot will be filled by Spring. Barb in Pa.
It is listed in over 20 countries as invasive. A pot full may become a garden bed full as it pushes out the local inhabitants. You may want to imprison it in a large pot with the rim above ground level. Jerry
Wow Jerry, I have this nice plant in my garden that has not spread in 2 years. It has small yellow flowers and I just love it. I told you I don't know much about garden plants... I will keep them in pots buried in the ground so stop the spreading. Why wouldn't they tell me that at the garden center or at least put it on the label. I do read them. Barb in Pa. :-D
Good morning, it is 'high' level weed in your country,certainly is here too, it spreads by seeds, one pod contains 1,000s, keeping it in a pot will not stop the spread of it,it roots so easily as you have noticed...another reason why it is noxious,Plant something else for the good of your area, not worth the trouble it will be if you need to get rid of it.
I just don't understand why all the garden centers sell this plant as a nice shrub and say nothing about it being invasive. I think I bought 3 of them. It's such a beautifully even shaped plant. I will keep an eye on it this Spring. Barb in Pa.
Barb, all plants are invasive in some parts of the world that doesn't make all plants invasive in all parts of the world. In the climates it really likes, it will spread like crazy but the amount of rain, sun light and length of growing season, type of soil and the Ph of the soil are all determining factors in it's invasiveness. Growers don't know all the areas where it is invasive and if they did the labels are not big enough to list them all. You can check any plants you are not sure of on the USDA website, here is the information on St. John's Wort http://plants.usda.gov/java/profile?symbol=HYPE you can see areas where it has been reported as being a problem plant Plus what is invasive in one county in a state may not be invasive in the next county in the same state. Check with the local garden club to see if they have any information on that. You can also contact you local county extension office to see if they have a list of known or possible invasive plants for you area. The Dallas Arboretum has it growing in the ground in their herb garden area and it is not invasive for them.
Thank you. I haven't seen it going wild and I have looked for little ones to pop up. I wanted to plant it in other areas of the gardens that's why, when I couldn't find those little ones spreading that I took clippings to start in the greenhouse. I will keep pulling if I get too much growing in one area. Our gardens are new enough to us yet that we watch every little new growth or leaf dying or weed. I have some that I can see is already spreading wildly like the octopus plant. I love it but now I am giving it away and pulling it with the weeds I find. Barb in Pa.
Saint Johnswort (herb) is in the mint family. It is known to cause photo-sensitivity in some people and live stock. While it is a valuable herb, I think you need to able to proactively limit it setting seed or to escape by rhizome. The peace and serenity of your life with your neighbors could be at risk if you let your St Johnswort escape. I've grown it, and had irate neighbors, even with mine in strict control... I'm just sayin'...
The woody shrub St. John's Wort that I use in landscape desogns here is not invasive. It grows approximately 3 feet high, and maybe 2 feet wide. I cut them down each spring, and they are pretty well mannered plants. Pretty yellow flowers!
We may possibly have two different plants mentioned here. The woody shrub medicinal plant St. John's Wort is Hypericum prolificum and not in the mint family. St. John's Wort Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Rosids Order: Malpighiales Family: Hypericaceae Genus: Hypericum Species: H. perforatum Mint Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Asterids Order: Lamiales Family: Lamiaceae Tribe: Mentheae Genus: Mentha
I told you I don't know anything about outside plants. It's my first few years and I have had many many distractions. So I of course leave all labels or save them at least. I never thought I would be using them from the envelope that I save them in but here it is... 'Hidcote' Hypericum patulum St. John's Wort How is that???? I also went out to the little sticks that are still out in my garden cause Kay, I didn't know I was to cut them down till Spring. Well, anyway, they seem to be spraying in one bunch of sticks, making a ray out to about 2 feet and make a perfectly rounded ball of green and yellow flowers. I moved the fallen oak leaves away from the base of my little plant and there is nothing spreading out wildly. I also keep my garden very well weeded and never have found little "warts" growing. I have started 28 little ones and hope to put them out in the Spring somewhere else in our gardens. Please tell me they are ok and won't go wild for my hubby to mow down with the tractor??? Barb in Pa. 8)
The information I have found on Hypericum patulum 'Hidcote' says it is a cultivar but some say it is a hybrid that has been renamed. Which ever it is it is not the medicinal St. John's Wort, that is the Hypericum perforatum. If it is a hybrid then most likely the seeds will be sterile and there is no reason to think there will an over abundance of plantlets showing up in your yard. If you have not had any problems with the plants showing up in other areas of the garden, then I wouldn't worry about it. I always safe tags and labels, since many plants have the same common name it is always better to have the Latin name to refer to, that way you know for sure what plant you have.
Many kinds of Hypericum. Mine is a shrub, after a couple years still just one (meaning, not invasive). Probably Hypericum androsaemum. Compact. Nice yellow blooms. Love it! Change to this one Barb... unless you want to make ...tea!
