Sunflower 'Starburst™ Greenburst'
Helianthus annuus hyb.

SKU # S1521

Product Type: Seed Packet

Approximate Seeds Per Packet: 15

Availability:

In Stock

$4.00

An explosion of flower heads with tousled petals greets gardeners who pop a few of these seeds into the ground after frost. A beautiful branching form and an amazing multitude of sunny flowers make it a "must-have" summer cut flower. Leave some heads to ripen seeds for birds.

Lifecycle: Annual

Hardiness: Half Hardy Annual

Size: 4-6' h x 1.5-2' w

Sun: Full sun

Soil: Regular to rich, well-drained

Season: Summer to fall

Seed to Bloom: 12-14 weeks

Color: Golden petals surround a lemon-lime center disk

Growing Guide
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HOW TO GROW Helianthus annuus hyb.

Sowing Instructions

Depth: 1/4"
Sprout Time: 5-14 days
Starting Indoors: Not recommended; sunflowers grow very quickly and do best when sown directly.
Starting Outdoors: Direct sow after last frost.
When to Set Outside:

Placement & Cultivation

Sunflowers' full heads of bloom follow the sun, an attribute called heliotropism. Be sure to plant them where they receive a full day of sun, spaced well apart. Water infrequently but deeply once established to encourage vigorous, deeply rooted plants that can withstand summer storms. A favorite cut flower–plant in back borders in informal cottage gardens, at the edge of vegetable gardens, or as a leafy and flower-filled hedge, where it attracts butterflies, bees, and birds.
Final Spacing: 1-2'
Water Use: Medium Water Use
Watering Details: About 1" of water per week, though they will tolerate some dryness.
Soil pH: Acidic to neutral
Fertilizer: Add 2" of compost and mix in prior to planting. Once established one application of a low nitrogen organic fertilizer is beneficial.
Diseases & Pests: Space well apart for increased air circulation to discourage foliar disease that may develop in wet weather. Remove crop residues after the season is over and rotate crops.
When to Cut For Bouquets: Fully opened flowers

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Number of Comments 1

Average rating:

10 of 10 people found the following review helpful

Starburst.. One stem Bouquets! Saturday, August 7, 2021

By Santa Rosa, CA

Select Seeds Confirmed Purchase

One stem is a five flower bouquet! Only 4 ft tall… didn’t Take over the whole garden. I can’t wait to plant lots more next year!

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Sunflower 'Starburst™ Greenburst'
Helianthus annuus hyb.

HOW TO GROW Helianthus annuus hyb.

Sowing Instructions

Placement & Cultivation

Ratings & Reviews

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Sunflower 'Starburst™ Greenburst' Helianthus annuus hyb.

HOW TO GROW Helianthus annuus hyb.

Sowing Instructions

Placement & Cultivation

Ratings & Reviews

Notify Me

Email A Friend

Sunflower 'Starburst™ Greenburst'
Helianthus annuus hyb.