Allium Purple Sensation 50 Seeds

Allium 'Purple Sensation' is a beloved ornamental onion known for its bold, globe-shaped clusters of rich violet-purple flowers. Each rounded bloom, about 4–5 inches wide, sits atop sturdy 24–36 inch stems, making a striking architectural feature in spring and early summer gardens. These flowers attract bees and butterflies and are beautiful in both fresh and dried arrangements.

• Botanical Name: Allium hollandicum 'Purple Sensation'

• Type: Perennial bulb

• Bloom Time: Late spring to early summer

• Flower Colour: Deep purple

• Height: 60–90 cm (24–36 in)

• Spread: 10–15 cm (4–6 in)

• Hardiness: Zones 3–9 (fully hardy in most of Canada)

• Deer & Rodent Resistant

• Pollinator-Friendly

  How to Grow Allium 'Purple Sensation' from Seed

  1. Seed Prep (Optional but Helpful):

  • Gently rub seeds between sandpaper or soak them in warm water for 12–24 hours to improve germination.

  2. Stratification (Cold Treatment):
  Allium seeds benefit from cold stratification to break dormancy:

  • Place seeds in a damp paper towel or sand inside a plastic bag.

  • Refrigerate for 4–6 weeks.

  • Alternatively, sow outdoors in fall to allow natural stratification over winter.

  3. Sowing Indoors:

  • Start indoors in late winter to early spring, after stratification.

  • Use seed trays with well-draining soil or a sandy seed starting mix.

  • Press seeds lightly into the surface and barely cover with a fine layer of soil.

  • Keep soil moist but not soggy.

  4. Germination Conditions:

  • Place in a bright, warm spot (15–20°C / 59–68°F).

  • Germination may take 3–6 weeks, sometimes longer.

  5. Transplanting:

  • Once seedlings are strong and weather is mild, transplant into the garden.

  • Choose a sunny, well-drained location.

  • Space young plants 10–15 cm (4–6 inches) apart.

  6. Ongoing Care:

  • Water moderately, allowing soil to dry slightly between watering.

  • Be patient! Plants may take 2–3 years to develop large enough bulbs to flower.