Posted: 24/04/2013 at 21:24
Eryngium giganteum are easy artjak. All that in and out of the fridge business can be avoided by sowing them when the plant naturally drops it's seed and leaving them outside to sort themselves out. After that they just go round and round in the garden as long as you let them seed.
E.planum germinated well but I couldn't keep it alive long term