What temperature is too cold for annuals?
Consequently, what temp is too cold for flowers?
Winter is hard on your flowers. Tender annual flowers like impatiens can't survive a frost or temperatures below 55 degrees. Half-hardy annual flowers can survive brief, light frosts and temperatures of 35 degrees to 45 degrees. To be safe, protect all your plants when the temperatures drop.
Furthermore, what temperature is too cold for marigolds? However, this doesn't mean the air is that cold, as frost can occur when your outdoor thermometer is showing temperatures closer to 40 degrees Fahrenheit. Temperatures of 40 F might not kill healthy marigolds, but when the air and ground around the plants hit the freezing mark, your marigolds will die.
Similarly, it is asked, what is the lowest temperature petunias can tolerate?
(16 to 18 C.). However, petunias usually tolerate temperatures as low as 39 F. (4 C.) with no problem, but they are definitely not plants that will survive the winter in most climates.
How cold is too cold for begonias?
They prefer daytime temperatures around 70 degrees Fahrenheit and 60 degrees overnight. Temperature dips below 50 degrees might damage begonias and prolonged cold snaps can weaken or kill them. Bring potted plants indoors to a cool porch or basement.