What Size Containers Are Needed to Grow Grapes?

Volume

• In the ground, grape roots can stretch 8 feet or more beneath the soil surface. Obviously, the roots won't grow this large in a container, but the more root surface underneath the soil, the larger the plant and the greater your yield. Accordingly, smaller containers produce smaller vines and fewer grapes. The minimum container size for growing grapes is one that can hold 5 gallons of soil. A container that can hold 15 to 20 gallons of soil is better.

Dimensions

• Another way to look at container size for a grape is to consider the width and depth. The ideal size would be a container that stands at least 18 to 24 inches tall and 12 to 16 inches deep. A container this size will allow the vine to produce a strong root system and correspondingly, strong canes and vigorous grape production.

Types of Containers

• You'll find containers made from all sorts of materials and most of them are suitable, as long as they're large enough and have adequate drainage holes. All of them have potential benefits and drawbacks, so select one suited to your climate and needs. Plastic containers hold moisture well and are lightweight, but they crack and chip over time. Unglazed clay is heavy and loses moisture quickly. Glazed pottery is attractive and durable, but it's expensive and may crack in cold weather. Wood has a rustic, natural appeal and lasts for a long time. Old whiskey barrels make a fine pot for grapevines. Once you've selected a pot, consider adding wheels so you can move it easily.

Considerations

• Grapevines grown in containers will be smaller than those grown in the ground, no matter how large the container, but they still need a structure to grow on. Install a sturdy trellis in the pot or place the container near a fence. As the vines become heavy, you might need to weigh the pot down to keep it from tipping over. Bricks or cinder blocks work for this purpose. Grapes need full sun, light, well-draining soil and adequate moisture. They're not as thirsty as other fruit crops, but they won't produce a good crop during drought conditions. Vines planted in pots tend to dry out more quickly, so water them frequently during hot weather, but avoid over-watering them. The soil should dry out slightly between waterings.