An upright plant that can grow as tall as 24 to 48 inches at maturity, foxglove (Digitalis purpurea) will add drama and height to a container on your patio or balcony. The spiky blooms are available in shades from pastel lilac to deep purple. Foxglove is a biennial plant that will develop only a rosette the first year and will bloom the second year. As an added benefit, foxglove will attract hummingbirds to your garden. Foxglove is hardy to USDA Planting Zones 4 to 8.
Prepare a sturdy pot with a wide bottom, as the height of the foxglove may cause the plant to tip or blow over in a wind. Avoid lightweight plastic pots and pots without drainage holes in the bottom.
Fill the pot to 1 inch from the top with a commercial potting mixture. Mix a granular time-release fertiliser into the soil. Refer to the label on the container for specific rates of application.
Remove the foxglove plant from its nursery container. Use a trowel to dig a hole large enough to accommodate the plant's root ball. Place the plant carefully in the hole, then tamp soil gently around the roots. The foxglove plant should be planted at the same soil depth at which it was planted in the nursery container.
Water the plant deeply, then allow excess water to drain through the bottom of the pot. Check the moisture in the pot every day by inserting your finger into the top inch of soil. Water the foxglove whenever the soil feels dry to the touch. Place the pot where water can drain freely through the bottom. It grows best in partial sun or shade.
Plant foxglove with care if you have children or animals, as the entire foxglove plant is toxic if ingested.