maybe a bird pulled it, i bought some frost guard from a garden center for 80 pence a meter but it was 1.2 meter wide, 4 bamboos around each plant fasten the frost guard to the first bamboo wrap it around the others tie it all up with fishing gut. and the frost guard is breathable and also lets sun light through so you can leave it on...
a few weeks back we left them coverd for 1-2 weeks or so and wen we uncover them they where great...
i think i mite cover them all again 2moro if so ill take pics to show how easy and cheap it is,, i think its called reemay in amarica brown dirt worrior uses it on his vid........ it cost us not mutch more than £20 to cover 16 plants and theyr all between18-28" tall
good luk to u all this season hopefully we have a nice summer...