Cold in the Greenhouse

When I got home from a trip Monday night the temperatures were in the negative! The next day I noticed some of my rose geraniums in the greenhouse had gotten nipped by the cold. Mind you, this is not really a greenhouse; it has no temperature controls. It is basically a shed with a brick floor, south facing windows and a large water container inside and my workshop on the other side. I was told by the previous owners that it never froze inside, but temps below zero may have pushed things. One of my rose geraniums is severely drooping right now but I am hopeful that it can recover. You can see another rose geranium looks pretty good as does the rosemary and lemon verbena. The common geranium is also blooming red which is great for the Holidays. I use this greenhouse for overwintering some of my plants and am trying my hand at starting some new plants as well; mint and lavender. I also have a try of mixed lettuces going which I will harvest from soon. Its nice to have fresh greens in the middle of winter for a salad. I am also housing some tender plants from the Herb Society garden. Some of these are not doing too well as I think not enough roots came with them upon transplant. They include stevia, lemon grass, bay, marjoram and a few others. If I remember correctly, the garden cleanup day was a cold and wet one and these were probably dug in haste! But, its always hard to predict Mother Nature and even they may come back.