Sunflower Red Sun (Helianthus annuus) – rusty red bloom with dark centre among leaves

Sunflower Red Sun

£2.50
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Sunflower Red Sun (Helianthus annuus) – rusty red bloom with dark centre among leaves
Beginner friendly

Sunflower Red Sun

Helianthus annuus 'Red Sun'

Pure vivid crimson-red petals without brown or orange — the cleanest red sunflower, declarative and energetic. Branching multi-headed habit, 10–14 day vase life.

£2.50

Free UK delivery on seed orders over £40

Dispatched from our Norfolk farm by Royal Mail, usually within one working day.

Your growing year

Sow, plant out and flowering months for this variety

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sow
Plant out
In flower
SowPlant outIn flower

At a glance

Height
150–180cm
Spacing
45–60cm apart
Position
They need full sun, ideally receiving at least 6 to 8 hours of direct sunlight every day.
Colour
Red
Seeds per packet
20
Soil
Sunflowers are heavy feeders. Work in plenty of well-rotted manure, garden compost, or a slow-release fertilizer before planting.
Grow guide How to grow Sunflower Red Sun Read the full guide →

About this variety

A clean pure crimson without a trace of brown or orange in it, round a near-black disc. That cleanness is the whole distinction. It is not the warm burgundy of 'Chocolate' and not the red-and-gold bicolour of 'Ring of Fire' but a flat declarative red that reads as red from the other end of a garden.

It branches, so a single plant throws multiple lateral stems through the season and keeps producing from July into September rather than giving you one flower and finishing.

At 60 to 90cm it is manageable and does not need the staking a two-metre giant does. Sow one seed per pot, because the taproot comes fast and hates disturbance, and protect the young plants from slugs for the first two or three weeks after they go out.

For cutting, take it when the outer petals have fully unfurled but the disc is still firm, recut the stem at an angle under water and stand it overnight in deep water before arranging. Ten to fourteen days in the vase after that.