If your plastic greenhouse is converted for the wintering of potted plants, a very careful selection of the different varieties must be made. Not all of them tolerate the icy temperatures in an unheated cold house and many representatives of the exotic species are afraid of the light during their rest break.
Not all indoor plants can overwinter in the greenhouse
Before we, as garden owners, retire to warm interiors when the cooler season begins, the sensitive large plants among the exotic species in particular need some attention again. Anyone who only owns an unheated foil greenhouse for overwintering potted plants, a so-called cold house, will perish additional frost protection of his growths, however, cannot avoid it. While certain species such as oleanders or olive trees survive the winter months in colder rooms without any damage, hibiscus, jacaranda, aloe laurel & co. like it a little warmer.
Observe optimal wintering temperatures
Irrigation or fertilizers are the exception during the dormant phase. As far as the feel-good temperature is concerned, the tropical-spoiled plants are very sensitive. Here are some examples of the temperatures in the foil greenhouse Overwintering of potted plants optimal are:
| plant type | frost sensitivity | Winter temperature (°C) |
|---|---|---|
| leadwort | not frost tolerant | 5 to 10 |
| nightshade | not frost tolerant | 5 to 10 |
| velvet violet | not frost tolerant | around 10 |
| Mediterranean Snowball | Frost tolerant down to -10 | 2 to 8 |
| Red ornamental banana | not frost tolerant | about 15 |
| hibiscus | not frost tolerant | about 15 |
| rosewood | not frost tolerant | about 15 |
| Large-leaved Thunbergia | not frost tolerant | about 15 |
tips
Particularly important: Even when there is frost, rotten or damaged parts of the plant can develop. It is therefore best to check every potted plant that is to be relocated to the plastic greenhouse for the winter for dead leaves and shoots.