Helianthus Pro Cut Plum Seeds

Helianthus Pro Cut Plum Seeds produce deep plum-coloured blooms on tall single stems. The pollen-free, daylength-neutral flowers suit dramatic garden and cut-flower displays.

Grow it successfully: Read the Sunflower Grow Guide — ProCut single-stem module.

Quick Grow Facts

• Plant Type: Annual
• Scientific Name: Helianthus annuus
• Seed Form: Raw seed
• General Sowing Time: Warm season after frost
• Position: Full sun
• Pretreatment: None; sow dry seed straight from the packet
• Sow Depth: 12–13 mm; cover the seed
• Light: Not required while the seed is covered; give full light after emergence
• Germination: 7–14 days at 21–24°C
• Spacing: 10–15 cm for cut stems; 25–30 cm for thicker garden stems
• Growth Form: Pollenless single stem
• Pinching: Do not pinch
• Height: 150–180 cm
• Flower Outcome: Plum-rose petals with a dark centre; generally 10–15 cm
• Days to First Cut: About 50–60 days from sowing

Why Grow This Variety

• Deep plum petals provide an unusual alternative to traditional sunflower colours.
• Pollen-free blooms suit clean indoor arrangements.
• Sturdy single stems reach 150 cm for a strong vertical display.
• Daylength-neutral flowering supports reliable blooms through the season.

Garden Uses

Use Pro Cut Plum in sunny beds, architectural plantings or bold indoor cut-flower arrangements.

Growing Notes

• Direct sow after frost, or transplant a young intact plug started only two to three weeks earlier.
• Cover 12–13 mm and hold at 21–24°C with even moisture; expect emergence in 7–14 days.
• Space 10–15 cm for bouquet stems, or 25–30 cm for thicker garden stems and larger heads.
• Do not pinch this pollenless single-stem cultivar.
• Harvest at about 50–60 days when the petals are just beginning to lift.

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