Mammoth Sunflower Seeds for Tall Flower Garden

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$16.49
$16.49
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Mammoth Sunflower Seeds produce tall plants with large, bright blooms that create a striking visual display in any garden. These plants grow upright and perform best in sunny locations with well-drained soil. The sturdy stems support large flower heads that develop over time. Suitable for borders, open landscapes, and backyard planting, these sunflowers add height and structure to outdoor spaces. Easy to grow and maintain, they are a popular choice for seasonal planting and garden decoration.
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Mammoth Sunflower Seeds for Tall Flower Garden

$16.49

Planting Season

Spring–Summer

Light Requirement

Full Sun

Plant Height

200–300 cm

Indoor/Outdoor

Outdoor
Planting Information
Life Cycle Annual
Plant Characteristics Tall flowering plant
Plant Type Ornamental
Flavour Profile Not Applicable
Life Annual
Germination Time 7–10 days
Fruit Size Large flower head
Soil Type Loamy
Soil pH 6–7.5
Spacing Between Plants 45–60 cm
Watering Needs Moderate
Harvest Time Not Applicable
Bloom Season Summer
Seeds per Pack 900
Seed Type Open Pollinated
Yield Potential High
GTIN 36002082867

Direct sow seeds in soil. Cover lightly. Water after sowing. Maintain spacing. Ensure warm conditions.

Provide full sunlight and fertile soil. Water regularly during growth. Support tall stems if needed. Maintain spacing. Avoid waterlogging.

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Frequently Asked Questions

Everything you need to know before you sow.

Do Mammoth sunflowers need support?
They may. The care instructions recommend supporting tall stems if needed, especially in exposed areas or when large flower heads develop.

Can Mammoth sunflowers create a privacy-style garden backdrop?

Their 200–300 cm height can create a tall seasonal visual screen when planted in a suitable row or group with enough space.

Why should Mammoth sunflowers be spaced 45–60 cm apart?
The spacing gives each tall plant room for roots, leaves and its large flower head while reducing excessive crowding.

Can Mammoth sunflowers be grown beside shorter flowers?

Yes. Place them behind shorter plants so their tall stems do not block the sunlight needed by lower-growing flowers.

How can large sunflower heads be protected from strong wind?

Choose a sheltered site and add a sturdy stake or support when stems become tall. Avoid waterlogged soil, which can weaken root conditions.

Can mature sunflower heads be left in the garden?

Yes. After flowering, mature heads can remain as a structural feature and may provide seeds for birds, depending on local wildlife.

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