Mammoth Sunflower Seeds Tall Annual Sunflower Flower Seeds Helianthus annuus

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$16.79
$16.79
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Mammoth Sunflower Seeds Helianthus annuus are a tall growing annual flower variety known for producing large bright yellow blooms and strong upright stems This heirloom sunflower variety develops broad flower heads with vibrant petals that create striking seasonal displays The plants grow vigorously and form tall stalks that support large blossoms during warm seasonal conditions This sunflower variety is valued for its impressive height and bold floral appearance making it a widely recognized flowering plant for seasonal ornamental cultivation
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Mammoth Sunflower Seeds Tall Annual Sunflower Flower Seeds Helianthus annuus

$16.79

Planting Season

Summer Season

Light Requirement

Full Sun

Plant Height

Tall Plant

Indoor/Outdoor

Outdoor Plant
Planting Information
Life Cycle Annual Plant
Plant Characteristics Fast Growing
Plant Type Flower Plant
Flavour Profile Neutral Use
Life Annual Plant
Germination Time 7–10 Days
Fruit Size Large Heads
Soil Type Loamy Soil
Soil pH Neutral Soil
Spacing Between Plants 1–2 Feet
Watering Needs Moderate Water
Harvest Time 80–100 Days
Bloom Season Summer Bloom
Seeds per Pack 250 Seeds
Seed Type Heirloom Seeds
Yield Potential High Yield
GTIN 36002053560

Sow seeds directly in soil at 2–3 cm depth in a sunny location. Maintain spacing between plants for proper growth and airflow.

Water regularly and ensure well-drained soil. Provide full sunlight and support tall plants if needed to prevent bending.

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Frequently Asked Questions

Everything you need to know before you sow.

How can tall Mammoth sunflowers be protected from bending?

The care instructions recommend supporting tall plants when needed. A sturdy stake or suitable support can help reduce bending in exposed locations.

How far apart should Mammoth sunflower plants be grown?

The listing recommends 1–2 feet between plants, giving tall stems and large flower heads enough room to develop.

Can Mammoth sunflowers be grown along a garden fence?
Yes. A fence-side position can provide a useful backdrop, provided plants receive full sun and have enough space for their height.

What happens after a sunflower finishes flowering?

The large flower head develops seeds as it matures. The listing identifies large heads as the fruit-size feature.

Can Mammoth sunflowers be used for cut flowers?

Yes. Their tall stems and large flower heads can be used in seasonal arrangements when cut at an appropriate stage.

Why should sunflower seedlings not be overcrowded?
Spacing reduces competition for light, water and root space and helps maintain airflow around tall plants and large foliage.

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