5 Dark Purple Hydrangea Seeds (Hydrangea macrophylla)

Looking for dark purple hydrangea seeds? Start bigleaf hydrangea (Hydrangea macrophylla) from seed and enjoy the process of raising shrubs from the very beginning. Please note: flower color and depth of purple depend on soil pH and aluminum availability, and seed-grown plants naturally vary from named cultivars. Expect 2–3 years to first blooms. Suitable for USDA Zones 6–9 (Zone 5 with winter protection).

Why Choose Dark Purple Hydrangea from Seed?

• Classic bigleaf hydrangea with showy mophead blooms
• Good for borders or containers; prefers morning sun and afternoon shade
• Tolerates a range of soils when kept evenly moist
• Clean, untreated seed—ideal for hobby growers and collectors
• Transparent note: seed lots may produce a range of pink–violet–purple shades

What’s in the Pack?

Sealed packet with 5 Hydrangea macrophylla seeds, packed dry for freshness—enough for a small trial or breeding project.

Planting Instructions

• When to sow: Late winter–spring indoors, or after last frost outdoors.
• Medium: Sterile, well-draining seed mix; pH around 6.0.
• Sowing: Surface-sow; press gently—light aids germination. Do not bury.
• Temperature: 68–75°F (20–24°C).
• Moisture: Keep evenly moist with a mist sprayer; use humidity cover for best results.
• Germination window: Typically 21–35 days, sometimes longer.
• Aftercare: Pot up at 2–3 true leaves; harden off gradually; provide partial shade in first summer.
• Color guidance: Deeper violet–purple tones are more likely in acidic soils with available aluminum (e.g., amend carefully with aluminum sulfate). Results vary by local water and soil.
• Growing zone: USDA 6–9; protect crowns/mulch in colder regions.

FAQs

Will the flowers definitely be dark purple?

Not guaranteed. Seed-grown Hydrangea macrophylla shows natural variation, and bloom color depends on soil chemistry (pH and aluminum). Expect shades from pink to violet to purple.

How long does it take to bloom from seed?

Usually 2–3 years to first flowers, depending on climate and care.

Where to buy Dark Purple Hydrangea seeds for sale?

At Seeds World, we list fresh Hydrangea macrophylla seeds with clear growing guidance and fast U.S. shipping. Each product page explains variability so you know what to expect before you buy.

Can I grow them in containers?

Yes. Use a large container with rich, well-drained mix; keep evenly moist and provide morning sun with afternoon shade.

Do these contain seeds or cuttings?

Seeds. Hydrangeas are often propagated by cuttings, but this listing is for seeds only.

Any tips for achieving deeper purple tones?

Use an acidic mix (target pH ~5.5–6.0) and ensure some aluminum availability. Amend slowly and test soil—over-amending can harm plants.