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Dividing Liatris, also known as blazing star or gayfeather, is an essential gardening task to ensure healthy growth and winter hardiness. Proper division helps rejuvenate older plants, promotes better flowering, and prepares them to withstand cold temperatures. This guide provides step-by-step instructions to successfully divide Liatris during the appropriate season.
Understanding When to Divide Liatris
The best time to divide Liatris is in early spring before new growth begins or in late fall after the plant has gone dormant. Dividing during these periods minimizes stress and allows the plant to recover before extreme weather conditions. Avoid dividing during the peak of summer or in the middle of winter, as this can harm the plant’s winter hardiness.
Tools and Materials Needed
- Garden spade or sharp shovel
- Garden fork
- Pruning shears or sharp scissors
- Gloves
- Watering can or hose
- Mulch (optional)
Step-by-Step Division Process
1. Prepare the Plant
Water the Liatris thoroughly a day before dividing to soften the soil and reduce stress on the plant. This makes it easier to dig up and divide without damaging the roots.
2. Dig Around the Plant
Use a garden fork or spade to carefully loosen the soil around the base of the plant. Gently lift the entire clump out of the ground, taking care not to damage the roots.
3. Divide the Clump
Using pruning shears or a sharp knife, divide the root clump into smaller sections. Each section should have several healthy shoots and a good portion of roots. Aim for pieces that are about 3 to 4 inches in diameter.
4. Replant the Divisions
Plant each division at the same depth as it was previously growing. Space the divisions about 12 to 18 inches apart to allow for growth. Fill in with soil and press firmly to eliminate air pockets.
Post-Division Care
Water the newly planted divisions thoroughly to help them settle in. Apply a layer of mulch around the plants to conserve moisture and protect roots during winter. Keep the soil moist but not waterlogged during the first growing season.
Tips for Winter Hardiness
- Plant divisions in a sheltered location if possible.
- Apply a thick layer of mulch in late fall to insulate roots.
- Avoid fertilizing late in the season to prevent new growth that may be vulnerable to cold.
- Ensure proper drainage to prevent root rot during winter thaws.
By following these steps and tips, gardeners can successfully divide Liatris and enhance its winter hardiness, ensuring vibrant blooms year after year.