Use this map to find your area's average first fall frost date.
A late freeze is one of the most aggravating things a gardener can experience. Many times is little you can do to prevent damage like this. But there are some steps you can take. Newly planted vegetables or frost tender perennials that are just emerging like this hibiscus can be covered with a pot. It's simple and very effective. Larger plants can be covered with a cloth sheet, avoid plastic sheet, you know, which actually causes more damage, not less. After late freeze, it's important to wait until summer to prune off the sheets. It's difficult to know right away how much damage occurred. Give the plant time to regrow then clip out the twigs.