To propagate Johnny Jump Ups, the most common method is by sowing seeds, either directly outdoors in early spring or starting them indoors several weeks before the last frost; you can also propagate them by dividing established clumps or taking stem cuttings, ensuring each cutting has a few leaves and planting them in a moist, well-draining medium.
Key points about propagating Johnny Jump Ups:
Seed propagation:
When to sow: Sow seeds directly outdoors in early spring or start indoors 6-8 weeks before the last frost.
Soil preparation: Use a well-draining seed starting mix.
Planting depth: Lightly cover seeds with soil, as they need light to germinate.
Watering: Keep the soil moist until germination.
Transplanting: Once seedlings have a few sets of leaves, transplant them outdoors to a sunny or partially shaded location.
Division propagation:
When to divide: Early spring or late fall when the plant is actively growing.
Method: Carefully dig up the plant and gently separate the clumps, ensuring each division has roots.
Planting: Transplant the divisions into prepared soil, spacing them appropriately.
Cutting propagation:
When to take cuttings: During the growing season
Cutting selection: Take healthy stem cuttings with a few leaves.
Rooting: Dip the cut end in rooting hormone and plant in a moist potting mix.
Care: Keep the cuttings in a humid environment until roots develop.
Important considerations:
- Light requirements: Johnny Jump Ups prefer full sun to partial shade.
- Soil conditions: Well-drained soil with added compost is ideal.
- Spacing: Space plants 6-12 inches apart.
- Deadheading: Regularly remove spent flowers to encourage continuous blooming.