Giant Single sunflower seeds packet – Helianthus annuus tall sunflower variety
Young Giant Single sunflower plant growing vigorously in UK garden soil
Side view of Giant Single sunflower seed packet
Close-up of Giant Single sunflower bloom with golden yellow petals and dark centre
Back of Giant Single sunflower seed packet with sowing instructions
Tall Giant Single sunflower with large yellow flower head and strong central stem

Giant Sunflower Seeds

Helianthus Annuus 'Giant Single'

Giant Sunflowers, the tallest Helianthus Annuus variety, are perfect for growing in pots or gardens. These majestic yellow sunflowers can soar over 2m, symbolising growth and positivity. Ideal for sunflower races, our sunflower seeds to plant promise robust sunflower growth and a garden alive with bees, butterflies, and birds. Plant sunflower seeds that transform into golden, giant blooms, bringing life and joy to your space.

Approx 20 seeds

  • Needs Love
  • Likes Sun
  • Cut Flowers
  • Pollinator-Friendly

Giant Sunflower Seeds – Quick Growing Guide

Sunflower 'Giant Single' seeds produce tall, striking flowers ideal for brightening gardens. Sow from March to September directly outdoors or in pots. They thrive in full sun with well-drained soil, requiring moderate watering. Harvest seeds in late summer for snacking or replanting.

How to Sow, Grow and Harvest Giant Sunflower Seeds

  • Sow:March–September, direct or in pots
  • Germination:7–14 days
  • Grow:Full sun, well-drained soil, support tall stems
  • Water:Moderate, keep soil moist but not waterlogged
  • Harvest:Late summer, when seed heads turn brown
  • Best for:Beds, borders, cut flowers

Grow in Your Garden

Grow Majestic Giant Sunflowers with Herboo