Tag: frost

Plants vary in their ability to tolerate cold temperatures and harsh conditions. Different areas in Colorado can have drastically different climates and varying weather conditions each year. All of these factors make it difficult to determine a “safe date” to plant.

We have complied a list of plants ranging from “Very Hardy” to “Tender”. We offer recommendations on planting dates in the Denver area for each group but caution that these dates are approximations. We strongly recommend hardening off your plants (especially annuals) before planting and keeping a close eye on the weather. If needed, covering plants during cold snaps or chilly nights can help protect them.

Very Hardy Plants

Very hardy plants can typically be planted 7 weeks before the average last frost date. In the Denver Metro Area, this is usually after April 1st.

Hardy Plants

Hardy plants can typically be planted 5 weeks before the average last frost date. In the Denver Metro Area, this is usually after April 20th.

Half Hardy Plants

Half hardy plants can typically be planted 3 weeks before the average last frost date. In the Denver Metro Area, this is usually after May 1st.

Tender Plants

Tender plants can be planted when there is no longer danger of frost. In the Denver Metro Area, this is usually after May 20th.