Q.How Can I Keep Geraniums During Winter?
Should geraniums be indoors during winter
Certified GKH Gardening Expert
To keep geraniums healthy during winter , it's advisable to bring them indoors. Geraniums are sensitive to frost and prefer temperatures above 50°F (10°C). Before moving them, inspect for pests and prune any dead leaves or flowers. Place the geraniums in a bright location, ideally near a south-facing window, to ensure they receive enough light during the shorter winter days. Water them sparingly, allowing the top inch of soil to dry out between waterings, as overwatering can lead to root rot. Additionally, you might consider reducing fertilization during the winter months since their growth slows down.
https://www.gardeningknowhow.com/ornamental/flowers/geranium/geranium-care.htm