Vinca Seeds - Mixed Periwinkle
$4.98
SunFull Sun
Height3-10 ft.
Days to Bloom70-100 Days
Sowing SeasonSpring, Summer
USDA ZonesAnnual
Germination Time7-10 Days
About Giant Sunflower Seeds
Sunflowers are vibrant, fast-growing annual flowers that bring color and height to gardens, attracting pollinators and birds.
Planting Guide:
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When to Plant: Sow outdoors in late spring after the last frost.
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Soil: Well-drained, fertile soil.
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Depth: Plant seeds 1 inch (2.5 cm) deep.
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Spacing: 12–18 inches (30–45 cm) apart for giant varieties.
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Light: Full sun (6–8 hours daily).
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Water: Moderate; keep soil moist but not waterlogged.
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Temperature: Germinates best at 70–78°F (21–25°C).
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Germination Time: 7–14 days.
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Blooming: Summer through early fall.
Great for
Cut Flowers Pollinator
Friendly Heat & Drought Tolerant
Cut Flowers Pollinator
Friendly Heat & Drought Tolerant
Why Gardeners Love It
Planting Guide
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Germination Support
If seeds do not germinate under recommended conditions, contact us within 30 days with your order number and photos of your setup. We will review eligible claims and help with replacement guidance, store credit or next planting steps.
Germination SupportGuidance for strong, healthy growth.
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