Flower SeedsHSC-SUN-038-PKT

Royal Hybrid® 1121 Sunflower (F1) Sunflower Seed — natural held bouquet

Royal Hybrid® 1121 Sunflower (F1) Sunflower Seed — botanical detail

Royal Hybrid® 1121 Sunflower (F1) Sunflower Seed — living floret closeup

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Helianthus annuus

A seed worth growing

Royal Hybrid® 1121 Sunflower (F1) Sunflower Seed

Item #HSC-SUN-038-PKT

An early sunflower for seed and birdseed.

A traditional-type hybrid grown for large, gray-striped seeds to eat or feed birds. Single-stemmed plants reach about 7' with one 8" head, and stand well.

Space plants 8–12" apart in rows 18–36" apart. 100,000 seeds plant about 5½ acres, and average yield is estimated at around 1,800 lb. per acre.

Flowers about 68–71 days from sowing; seed is ready in about 100–110 days. F1 hybrid.

Specs

Packet: 250 seeds
Average 2,600 seeds per lb.

In stock — Packet

$6.40

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Know before you sow

Quick Facts

Latin Name: Helianthus annuus
Days To Maturity: 68-71 to flower, 100-110 for seed
Life Cycle: Annual
Hybrid Status: Hybrid (F1)
Product Features

Growing times vary with weather, soil and local conditions.

Growing guide

From seed to harvest

Wait for warm soil

60°F or more.

1–1½" deep

8–12" apart.

Cut when petals drop

Seed is mature.

Chop stalks fine

Before working in.

Growing Information

Scientific name

Helianthus annuus

What it does

As a cover crop, sunflowers make lots of biomass, break up compacted soil, scavenge nutrients and feed beneficial insects with pollen and nectar. Also grown for edible seed and birdseed.

Sowing

A warm-season crop: wait for soil of at least 60°F (70–85°F is ideal). Sow 1–1½" deep with a drill or garden seeder, or broadcast and harrow in lightly.

Spacing

8–12" apart in rows 18–36" apart.

Seeding rate

1/2–1 lb. per 1,000 sq. ft.; 15–40 lb. per acre.

Light and soil

Full sun and well-drained soil, pH 5.5–7.8.

Height

About 7'.

Harvest

For seed, cut heads once petals drop and seed is mature. Rub heads over 1/2" hardware cloth on a frame above a box, then spread the seed to dry.

Termination

Mow at flowering or let frost kill it. Standing winter-killed stalks feed birds and shelter pollinators over winter. Stalks and root balls are tough to break down, so chop finely before working in, and avoid ahead of crops that need a fine seedbed. Plants left to set seed will volunteer next year.

Packet

250 seeds.

Seeds per lb.

About 2,600 on average.

Satisfaction Guarantee

We want every packet you buy from Hensley’s Seed Co. to grow well for you.

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