hi pitta its the GOY encyclopedia of plants ,blogs anything you need to know about gardening, its at the bottom of your home page in black block, click onto a letter if you know what your looking for, you will soon get the hang of this, terratoonie has just done a blog on this question to help people understand, hope this helps you :o)
sandra

Sanbaz thank you tou are very kind.

your welcome pitta :o))