Mammoth – 3m tall!

$5.50/10 seeds

SUNFLOWER – Mammoth Giant (10 Seeds)

Helianthus annuus

Description: Our tallest sunflower up to 3 meters tall, organically grown by us, it requires some support to protect from strong winds or plant near a structure that wont get winds.  These sunflowers have large grey and black striped seeds (as opposed to giant Russians black only seeds).  Great feed for bids and parrots but as the seeds are quite big they might not be suitable for all birds

  • Height: 250-300cm
  • Flower heads: Single flower head
  • Germination: 3-7 days, temp above 18oC
  • Sowing: 1cm deep. Start in pots or direct in ground (if snails and birds are not an issue)
  • Spacing: 50-60cm apart
  • Soil fertility: Rich compost filled, well-draining soil. Sunflowers have a high potassium requirement and ensure your soil is not boron deficient.

Growing Tips: Water deeply occasionally rather than regular short sprinkles.  Concentrate water towards the base of the plant rather than the leaves to avoid disease issues.

In stock

Additional information

Additional information

When to sow

Spring, Summer

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