You can grow stamnagathi in the UK. It's best to sow in a tray and prick out seedlings into modules before planting out or plant straight into the ground, as germination for stamnagathi seed (available in many garden centres etc in Greece from various seed companies) can be erratic. Sowing it this way you can plant a neat row or two. Best to sow the seeds in June, which means that you avoid the plant's tendency to flower in early summer and you get a sturdy tap root established before winter, which will help the plant survive until Spring. The leaves die back and reappear around April. You can take several harvests in the growing season (Spring to early winter). You cut the whole rosette growing out of the tap root and it will grow back (frequently as many rosettes growing out of a single large taproot). If you let a few plants to flower you will also get the characteristic spines, pretty blue flowers, and lots of new seed for the next season. I have plants without any winter protection coming up for the third year now. It helps to grow them in a raised bed though for ease of weeding and for telling the plants apart easily from native weeds. Myroni is chervil and it is also very easy to grow; you can have chervil all winter from one sowing in August. Radikia (the various rosette-leaved chicories eaten widely in Greece throughout the winter) are also easy to grow (and can give several harvests) but they don't survive the winter without protection in the UK climate.