Heat-Resistant Containers for Plants and Flowers

Clay

• Clay, terracotta or other natural materials stand up to the heat well. These materials are porous, meaning air circulates freely to the roots, keeping them cooler. However, this quality also causes the soil to dry out quickly. Glazed clay pots hold moisture longer as they decrease the amount of air circulation. With containers, size is important, according to Colorado State University. Containers should be large enough to contain enough soil so plants don't dry out easily. The container should match the size of the plant, according to Ohio State University Extension. Smaller containers should be used for smaller plants, and larger containers should be used for groups of plants or single larger varieties to allow for root development.

Wood

• Wooden containers are semi-porous. They don't lose as much moisture as clay but allow more air circulation than plastic pots. If your wooden container lacks proper drainage, it's easy to drill a hole in the bottom of the pot. Wooden planters don't retain the heat of the air, keeping the plant's roots cool. Wooden containers are also environmentally friendly, since wood is a natural product that easily decomposes. Soil is as important as the container. Garden soil shouldn't be used in containers, according to University of Arizona Extension. Choose a lightweight soil that contains perilite or other absorbent crystals that hold water until the plant needs it.

Plastic

• Plastic is a non-porous material that will hold water longer, keeping your plants hydrated in warm temperatures but restricting air movement to the roots. It's essential for plant containers to have good drainage to prevent the buildup of moisture in the soil. This can cause the growth of mold, mildew and root rot. Grouping several plastic pots together will create a beautiful display, and the plants will shade each other and increase the humidity in the air. Pale-colored containers absorb less heat than darker containers.

Summary

• All container plants require more frequent watering than similar plants located in garden soil. Water these plants when the first inch of soil is dry. In warm weather, this may mean twice a day. Even plants that prefer full sun benefit when sheltered from the afternoon sun. Never let the soil in your containers dry out. This causes your plant stress and decreases its lifespan. Plant heat-tolerant plants in these containers to assure a long-lived and lush container garden.