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Hollyhocks are tall, beautiful perennials that add vertical interest and color to gardens. Over time, they can become crowded, which can lead to reduced flowering and health issues. Knowing when and how to divide hollyhocks is essential for maintaining their vigor and appearance.
Understanding Hollyhock Growth
Hollyhocks typically grow from root crowns and produce tall flower stalks with multiple blooms. They are biennials or short-lived perennials, often thriving for 2-3 years before needing division. Proper timing ensures minimal stress and promotes healthy growth.
When to Divide Hollyhocks
The best time to divide hollyhocks is in early spring, just as new growth begins or in late fall after the plant has finished flowering. Dividing during these periods allows the plant to recover and establish new roots before the growing season.
Spring Division
Dividing in spring is ideal because it coincides with the start of active growth. It gives new plants ample time to develop strong roots and produce flowers in the same season.
Fall Division
Fall division is suitable if you want to transplant or rejuvenate mature plants. Wait until the plant has finished flowering and the foliage begins to die back. This timing reduces stress and helps the plant settle before winter.
Techniques for Dividing Hollyhocks
Dividing hollyhocks involves careful digging and separation of the root crown. Follow these steps for successful division:
- Water the plant thoroughly a day before dividing to soften the soil.
- Use a garden fork or spade to gently dig around the base of the plant, being careful not to damage the roots.
- Lift the entire root ball from the ground.
- Gently shake off excess soil to expose the root crown.
- Divide the root crown into sections using a sharp, clean knife or garden shears, ensuring each section has healthy roots and at least one growing point.
- Replant the divisions at the same depth as the original plant.
- Water thoroughly and mulch around the new plants to retain moisture.
Caring for Divided Hollyhocks
After dividing, hollyhocks need proper care to establish and thrive. Keep the soil consistently moist, especially during the first few weeks. Fertilize with a balanced fertilizer to promote healthy growth. Support tall stalks with stakes if necessary to prevent toppling.
Conclusion
Dividing hollyhocks at the right time and with proper techniques can rejuvenate your plants and extend their lifespan. Spring and fall are the best periods for division, and careful handling ensures healthy, vibrant hollyhocks for seasons to come. Regular division also helps control their size and encourages more abundant flowering.