I put plastic gallon milk jugs (with the bottoms cut off) over the rocket, and the whole bed under the blanket, up on hoops. I heaped up straw on the other beds. So everything made it through that spell just fine.
Then we had several nice days. And then yesterday afternoon we had a howler come through. Saw it coming on the radar and weather report and ran over to prep again. Very windy, cold, some snow, some sleet. Continued like that all night. I went over to the allotment this morning and found that the cover had been blown half off and was flapping violently in the wind, has a large hole in the top, and some of the milk jugs were tipped over. I put everything back in place as best I could and will just have to hope for the best. With that big hole in the top it's not going to have kept much heat in tonight. The beds with the straw on them did just fine. Not sure anything is still alive under there, but I left the straw to keep the seedlings safe from the wind and cold. I assume they can manage a couple of days like that, in an emergency, without sunlight. I now have a replacement cover available and will just watch the weather and go back out tomorrow when it's drier to try to tidy things up.
I was also using the cover to keep the little white butterflies away from the kale and broccoli (as their offspring are the dreaded cabbage loopers!) but I may just have to chance it without a cover. Or I might put the new one on and if heavy winds are forecast again just go take the hoops out and let it lay on the plants, with some boards over it strategically to hold it down. On the good side, this will have almost assuredly killed the white butterflies. Which is sad, but.... They'll be back.
The beets were very tiny plants, and the fennel and carrots had just started to come up. Bummer! Oh, well. I guess there is still time to replant if they didn't make it! It's been snow going by sideways, with the sun shining and the temp in the upper 30s. On and off all day. It comes in low dark squalls, then is gone. Looking out after or before one of the episodes and you wouldn't have a clue anything had happened at all! Lovely trees all in flower, etc.
Well, THIS is certainly a different kind of gardening experience for us!