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Growing lupines can be a rewarding experience, but over time, these beautiful plants may become crowded and less vigorous. Knowing when and how to divide your lupines ensures they stay healthy and continue to thrive in your garden.
Understanding When to Divide Lupines
The best time to divide lupines is in early spring or immediately after they have finished blooming in late spring or early summer. Dividing during these periods allows the plants to recover and establish new growth before the growing season ends.
Signs Your Lupines Need Dividing
- The plant has become overcrowded or the clumps are very large.
- Flower production has decreased significantly.
- The center of the plant appears sparse or dead.
- The plant shows signs of disease or pest infestation.
How to Divide Lupines
Dividing lupines involves carefully separating the root clumps to promote healthy growth. Follow these steps for successful division:
Preparation
Choose a cool, overcast day to minimize stress on the plants. Prepare your tools, including a sharp spade or garden fork, and water the plant thoroughly the day before dividing.
Digging Up the Plant
Carefully dig around the base of the lupine, loosening the soil to lift the entire clump. Be gentle to avoid damaging the roots.
Dividing the Clumps
Use a sharp knife or garden spade to split the root ball into sections, ensuring each division has healthy roots and several shoots. If the roots are tightly bound, gently tease them apart.
Replanting
Plant the divisions at the same depth as they were growing before. Space them about 18-24 inches apart to allow for growth. Water thoroughly after planting and mulch to retain moisture.
Caring for Divided Lupines
Provide adequate water during the first growing season and consider fertilizing with a balanced, slow-release fertilizer. Remove spent flower stalks to encourage new blooms and prevent disease.
Conclusion
Dividing your lupines at the right time and with proper technique can rejuvenate your plants and promote healthy, vibrant blooms year after year. Regular maintenance ensures your garden remains a stunning display of these charming perennials.