You would think I had learnt by now to research my plants before buying. I once had a Hypericum (St John's wort) growing in my garden in St Louis. It was a lovely bush with yellow flowers and very mannerly. So I bought a packet of seeds and planted 4 plants in my English garden. They grew well but had very small leaves and no flowers and behaved like a rock garden plant growing and spilling over the wall. I was convinced that that packet must have had the wrong seeds. Determined to have this plant I bought another packet from another company. Same result. Only now did I do my research.
Hypericum perforatum is listed as a noxious weed in 20 countries. It spreads by rhizomes which are now taking over my garden. Believe me I have had this lesson before and I have a "right royal battle" on my hands to get rid of it.
and I quote:
"There is no gardener without humility. Nature is constantly sending even its oldest scholars to the bottom of the class for some egregious blunder" Alfred Austin.