Can Digitalis Be Grown in Pots?

Foxglove

• Grown commercially to produce digoxin, digitalis is used in medicines to strengthen weak or irregular heartbeats. All parts of the plant contain poisonous substances so children and pets should be kept away from it. In spite of its toxic nature, it is a favorite of gardeners because of its beautiful flowers, which grow in a cluster along the plant's stalk. It grows well in containers and can add a vertical accent among smaller or bushier plants. Any seeds will take a year of growth before the plant can produce flowers or seeds. If you're looking for blooms right away, it is best to buy an established plant.

Preferred Conditions

• Foxglove makes a good balcony plant because it doesn't mind partial or full shade and, because of its height, needs to be staked or sheltered from wind. It prefers cooler areas and is hardy in U.S. Department of Agriculture plant hardiness zones 4 to 8. It needs soil that is nitrogen-rich, slightly acidic and moist, but not soggy. Mulch to help the soil retain moisture. Good drainage is important to keep the plant's roots sound. Cutting the stalk when the flowers begin to die (deadheading) can produce a second set of blooms; if you're looking to let the foxglove self-seed, avoid deadheading.

Pests and Diseases

• All plants have pests and diseases, but foxglove is generally healthy. Foxglove pug larvae sometimes prey on the flowers, and moths and butterflies nibble on leaves. As long as your plant is otherwise healthy, these pests pose little risk. The best defense against insects and bacteria is an unstressed plant.

Winter Care

• After the leaves drop for the winter, keep the pots or containers well insulated to keep them warm. This can be done with thermal blankets or foam rubber wrapped around the container. Mulching heavily will also help retain heat and moisture through the winter months, and sheltering the plants from cold winds will help keep the soil more moist.