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Russian Sage (Perovskia atriplicifolia) is a popular perennial known for its aromatic, silvery foliage and tall, spiky purple flowers. Proper fertilization can enhance its growth, flowering, and overall health. Many gardeners wonder when and how to fertilize Russian Sage, especially after deadheading.
Understanding Russian Sage’s Nutritional Needs
Russian Sage is a hardy plant that thrives in well-drained soil. It prefers moderate nutrients and does not require heavy feeding. Over-fertilizing can lead to excessive foliage growth at the expense of flowers, or cause the plant to become floppy and less drought-tolerant.
Why Fertilize After Deadheading?
Deadheading, the process of removing spent flower heads, encourages rebloom and keeps the plant looking tidy. Fertilizing after deadheading can support a second bloom cycle and promote healthy foliage. It also helps replenish nutrients that may have been depleted during the flowering period.
Timing for Fertilization
The best time to fertilize Russian Sage is in early summer, immediately after deadheading. This allows the plant to absorb nutrients during its active growth phase and prepares it for potential reblooming later in the season.
Types of Fertilizer to Use
- Balanced granular fertilizer (such as 10-10-10)
- Slow-release fertilizers
- Organic options like compost or fish emulsion
How to Fertilize Russian Sage
Apply fertilizer according to the package instructions. For granular fertilizers, evenly distribute around the base of the plant and water thoroughly. Organic fertilizers can be applied as a top dressing or diluted in water for a foliar feed. Avoid over-fertilizing, which can cause excessive foliage growth.
Additional Tips for Healthy Russian Sage
Besides fertilization, ensure your Russian Sage is planted in well-drained soil and receives full sun. Prune back in early spring to encourage bushier growth. Mulch around the base to retain moisture and suppress weeds. Proper care will keep your Russian Sage vibrant and thriving.