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Russian sage (Perovskia atriplicifolia) is a popular perennial known for its aromatic gray-green foliage and tall spikes of lavender-blue flowers. Over time, however, even the most vigorous Russian sage can become overcrowded, leading to reduced flowering and overall health. Luckily, rejuvenating your aging Russian sage is simple through a process called division.
Understanding When to Divide Russian Sage
Dividing Russian sage is best done in early spring or late fall when the plant is dormant. Signs that your Russian sage needs division include:
- Reduced flowering or fewer blooms
- Overly dense or woody growth at the base
- Plants that appear to be outgrowing their space
- Fewer healthy new shoots
Tools and Materials Needed
- Garden spade or sharp shovel
- Garden fork or rake
- Pruning shears
- Gloves
- Compost or organic matter (optional)
- Watering can or hose
Step-by-Step Division Process
Follow these steps to successfully divide your Russian sage:
1. Prepare the Plant
Water the plant thoroughly a day before dividing to minimize stress and make digging easier.
2. Dig Around the Plant
Use a spade or garden fork to carefully loosen the soil around the base of the plant, digging about 12-18 inches away from the crown.
3. Lift and Divide
Gently lift the entire root ball. Use pruning shears to cut into large clumps or sections, ensuring each division has healthy roots and several shoots.
4. Replant the Divisions
Plant each division at the same depth as the original, spacing them about 18-24 inches apart. Fill in with soil and press firmly.
5. Water and Mulch
Water the newly planted divisions thoroughly. Applying mulch around the base helps retain moisture and suppress weeds.
Caring for Divided Russian Sage
After division, Russian sage benefits from proper care to ensure healthy growth:
- Water regularly during dry periods, especially in the first growing season.
- Apply a balanced fertilizer in early spring to promote vigorous growth.
- Prune back in late winter or early spring to encourage bushier growth.
- Remove any dead or woody stems to maintain a healthy shape.
Benefits of Dividing Russian Sage
Dividing Russian sage offers several advantages:
- Revitalizes older plants, encouraging new, lush growth
- Creates additional plants for sharing or landscaping
- Maintains plant vigor and prevents disease
- Enhances flower production and overall appearance
Conclusion
With proper timing and technique, dividing Russian sage is a straightforward way to breathe new life into your perennial. Regular division ensures your Russian sage remains healthy, vibrant, and a beautiful feature in your garden for years to come.