Yarrow 'Summer White'

3000 Seeds

Seeding Yarrow ‘Summer White’ (Achillea millefolium) is a great choice for adding long-lasting, drought-tolerant beauty to your garden. This white-flowered yarrow is a perennial, attractive to pollinators, and great for cut flowers or naturalized plantings.

Here’s how to grow it successfully from seed:

🌿 Yarrow ‘Summer White’ – Seeding Guide

✅ Quick Overview

• Type: Perennial

• Height: 60–90 cm (24–36 in)

• Bloom Time: Early to late summer

• Light: Full sun

• Soil: Well-drained, average to poor soil

• Hardiness: USDA zones 3–9 (cold hardy)

🌱 Step-by-Step Seeding Instructions

1. When to Sow

• Indoors: 8–10 weeks before last frost

• Outdoors (direct sow): After last frost, or in late summer/fall for natural stratification

2. Seed Preparation

• Light-dependent germinator: Do not cover seeds with soil

• Optional: Cold stratify seeds for 2–4 weeks in the fridge to improve germination (not always required)

3. Indoor Sowing Instructions

• Seed trays or shallow containers

• Soil: Sterile seed-starting mix, well-draining

• Sowing depth: Surface sow; gently press seeds into soil

• Light: Bright light or grow lights (12–16 hrs/day)

• Temperature: 18–21°C (65–70°F)

• Germination: 10–21 days

💧 Watering

• Mist gently to keep surface moist but not soggy

4. After Germination

• Thin or transplant seedlings once they develop 2–3 sets of true leaves

• Harden off before planting outside

5. Transplanting Outdoors

• Spacing: 30–45 cm (12–18 in) apart

• Location: Full sun, poor to average soil (they thrive on neglect!)

• Avoid rich soil and overwatering—it causes floppy growth

🌼 Care Tips

• Low maintenance once established

• Deadhead spent blooms to encourage more flowering

• Divide clumps every 2–3 years to rejuvenate

• Avoid over-fertilizing—it encourages excessive leaf growth over flowers