When plants are exposed to frost, it can cause a lot of damage. The damage can range from browning leaves and dry out the plant to killing the plant completely. Knowing how to tell if your plants have frost killed them is important in order to avoid unnecessary waste of time and money.
The leaves will be brown and there will be lots of dead or dying leaves as well as stems. The plant will have a noticeable yellowing or browning color. If you spot these signs on your plants, they likely have been frost killed by frost.
For indoors plants, it is best to check the leaves for frost damage within a few days of a frost. To do this, you should use your hands to gently push down on the top of the leaves and feel for any raised areas or bumps.
For an outside plant, it is easier to see if the leaves are frosted. To do this, simply look at how much water you see coming out of where stems meet leaves. If you can see water dripping from where stems meet leaves then the plant has been damaged but if no water comes out then its fine.
Some plants will show symptoms of frost damage on their leaves quickly while others may not show their symptoms until they have been damaged by moisture on their roots.