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Dividing lupines before winter is an essential gardening task that helps maintain healthy plants and encourages vigorous growth in the following season. Proper division ensures that your lupines remain robust and can withstand the cold months ahead.
When to Divide Lupines
The best time to divide lupines is in late summer to early fall, typically between August and September. This timing allows the plants to establish new roots before the first frost, promoting healthy growth in spring.
Tools Needed for Division
- Sharp garden spade or knife
- Garden gloves
- Pruning shears
- Watering can or hose
- Clean containers or pots (optional)
Step-by-Step Division Process
Follow these steps to divide your lupines effectively:
1. Prepare the Plant
Water the lupine thoroughly a day before dividing to soften the soil and reduce stress on the plant. This makes the division process easier and less damaging.
2. Dig Around the Plant
Use a spade or garden fork to carefully dig around the base of the lupine, about 6-12 inches away from the plant’s crown. Gently loosen the soil to expose the root system.
3. Lift and Divide
Lift the plant out of the ground with the root ball intact. Use a sharp knife or spade to divide the root clump into smaller sections, each with healthy roots and at least one growing point or crown.
4. Trim and Prepare Divisions
Trim away any damaged or weak roots. If necessary, remove old or diseased foliage to promote healthy new growth.
5. Replant or Store
Plant the divisions immediately into prepared soil, ensuring they are at the same depth as before. Water thoroughly. If planting immediately isn’t possible, store divisions in a cool, moist place until you are ready to replant.
Caring for Divided Lupines
After dividing, provide proper care to ensure successful establishment:
- Water regularly, especially during dry spells
- Apply a balanced fertilizer in early spring
- Mulch around the plants to retain moisture and suppress weeds
- Monitor for pests and diseases
Benefits of Dividing Lupines
Dividing lupines offers several advantages:
- Promotes healthier, more vigorous plants
- Controls plant size and prevents overcrowding
- Encourages more abundant flowering
- Rejuvenates old or weak plants