Hardening Off Plants Cool Spring

Question

This spring is very cool. I have rhododendron azalea and hostas to plant, and Heather. I had started hardening them on my second floor balcony. I was to overnight them third day of hardening. Temp was going to drop to 3°. So now they’re still in my house.

Answer 1

I am unfamiliar with climate in your country, and am not sure of the question being asked, here.

What I can do is post some articles that will help you to grow the plants in question.

https://www.gardeningknowhow.com/ornamental/flowers/heather/growing-heather.htm

https://www.gardeningknowhow.com/ornamental/foliage/hosta/growing-hosta-plants.htm

https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azaleas-noteworthy-shrubs-for-any-garden.htm

https://www.gardeningknowhow.com/ornamental/shrubs/rhododendron/rhododendron-care.htm