Arabis caucasica (Rock Cress)

Seed Treatment (Stratification)

  • Cold stratification:

    1. Place seeds in a damp paper towel inside a plastic bag.

    2. Refrigerate at 34–40°F (1–4°C) for 4–6 weeks.

    3. After stratification, sow seeds directly in the garden or start indoors.

Sowing Instructions

  1. Best Time to Sow –

    • Outdoors: Early spring or fall.

    • Indoors: Start 6–8 weeks before the last frost.

  2. Soil Requirements – Well-draining, sandy or loamy soil with a neutral to slightly alkaline pH.

  3. Sowing Depth – Lightly press seeds onto the soil surface; do not cover heavily as they need light to germinate.

  4. Spacing – 6–12 inches (15–30 cm) apart.

  5. Watering – Keep soil moist but not soggy during germination.

  6. Temperature for Germination – 65–75°F (18–24°C).

  7. Germination Time – 14–21 days.

Care After Germination

  • Sunlight – Prefers full sun but tolerates partial shade.

  • Watering – Drought-tolerant once established; water moderately.

  • Fertilization – Minimal fertilization is needed; a light application in early spring can help growth.

  • Pruning – Trim back after flowering to encourage new growth and maintain shape.

  • Overwintering – Hardy in most climates; provide mulch for extra protection in colder regions.

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