How to Plant Foxglove Seeds in Zone 4

Overview

Foxglove is a biennial plant that will reseed itself under the proper conditions. Collect and plant seeds on a yearly basis to guarantee the plant's return after the two growing cycles. The foxglove plant will produce tall spikes of bell-shaped flowers in USDA growing Zone 4 in the months of June and July during the second year of growth. The plant foliage remains low to the ground with the flower spikes reaching a height of 2 to 5 feet depending on the variety.

Step 1

Choose a planting location that has a well-draining soil and full-sun to partial-shade conditions. Partial-shade conditions should be during the hot afternoon hours instead of morning.

Step 2

Mix compost into the garden bed to increase the soil's nutrient value and moisture retention.

Step 3

Plant the foxglove seeds directly into the garden soil in USDA growing Zone 4 after there is no danger of frost in the spring months through the midsummer. Place the seeds into the soil and cover lightly with one-eighth inch of soil. Space the plants 24 inches apart for best results.

Step 4

Water newly planted seeds daily until seedlings begin to appear. Continue to water the seedlings weekly to keep the soil moist but not wet when rainfall levels are less than 1 inch per week. Monitor the soil moisture and water more frequently if necessary.

Step 5

Fertilize the foxglove plants with an all-purpose fertilizer once the seedlings have become established plants. Fertilize mature plants on a monthly basis.

Step 6

Apply a thin layer of compost around foxglove plants each spring to increase the nutrient value of the soil.

Step 7

Apply a 2-inch layer of mulch on top of the compost around foxglove plants to assist with moisture retention and weed control.

Step 8

Stake tall growing foxglove varieties to prevent drooping and flower damage.

Step 9

Remove flower spikes after flowering is completed to encourage additional blooms. Do not remove flower spikes if you want to collect seeds.