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Foxglove (Digitalis purpurea) is a stunning perennial plant known for its tall spikes of tubular flowers. To keep foxglove healthy and vibrant, proper fertilizing is essential. Understanding the right schedule for feeding can promote lush growth and abundant blooms.
Understanding Foxglove Nutritional Needs
Foxglove prefers well-drained soil rich in organic matter. While it can grow in less fertile soils, regular feeding encourages stronger stems, larger flowers, and overall plant vigor. The key nutrients for foxglove are nitrogen, phosphorus, and potassium, which support growth, flowering, and root development.
Fertilizing Schedule for Foxglove
Early Spring
As new growth begins in early spring, apply a balanced, water-soluble fertilizer such as 10-10-10. Use about once every 4-6 weeks to promote healthy leaf and stem development.
Pre-Bloom Period
About six weeks before the expected flowering time, switch to a fertilizer higher in phosphorus, like a 5-10-10 formula. This encourages robust flower production. Continue feeding every 4-6 weeks, ensuring the plants are well-nourished for blooming.
During Blooming
While foxglove is flowering, provide a fertilizer with a balanced or slightly higher potassium level, such as 10-10-20. This supports flower longevity and overall plant health. Fertilize every 4 weeks during the blooming season.
Post-Bloom and Fall
After flowering, reduce fertilizing frequency. Use a diluted, low-nitrogen fertilizer to help the plant recover and prepare for dormancy. Fertilize once in late fall if the plant is still actively growing.
Additional Tips for Fertilizing Foxglove
- Always water the plant thoroughly before applying fertilizer.
- Avoid over-fertilizing, which can lead to excessive foliage growth at the expense of flowers.
- Use organic options like compost tea or fish emulsion for a gentle, natural feed.
- Mulching around the base helps retain moisture and provides nutrients as it decomposes.
By following this fertilizing schedule and tips, gardeners can enjoy healthy, vibrant foxglove plants with abundant, beautiful flowers season after season.