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The Sunflower 'Solar Flash F1 Hybrid' by Thompson & Morgan is a compact, multi-headed variety ideal for gardeners with limited space who want to add vibrant gold and bronze color to their patios. While it produces stunning, unique blooms suitable for containers or cut flower arrangements, gardeners should note that it requires consistent moisture and staking in windy areas to maintain its compact 50cm height. This hybrid is perfect for those seeking a manageable, annual garden feature that provides a dramatic, long-lasting aesthetic throughout the summer months.
| Brand | Thompson & Morgan |
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Each packet contains 10 seeds.
No, sunflowers require full sun to thrive and produce the best coloration on their petals.
Outdoors, sow from April to May; indoors, you can start as early as March.
While not strictly necessary, removing spent blooms can encourage a cleaner look and may stimulate the development of newer heads.
The Solar Flash F1 is an annual, meaning it completes its life cycle in one growing season.
Plant the seeds at a depth of 1cm (1/2 inch).
Ensure indoor temperatures remain within the 20-25°C range and keep the compost moist but not saturated.
The plants may need staking; insert small canes into the soil near the main stem and tie loosely to prevent wind damage.
Check soil moisture levels; this is often caused by overwatering or poor drainage. Ensure pots have drainage holes.
To begin, direct sow seeds from April to May in a sunny location with well-drained soil, planting at a depth of 1cm in drills spaced 45cm apart. For an earlier start, sow indoors from March to April in 7.5cm pots at temperatures between 20-25°C. Germination typically occurs within 21 days. Once seedlings are large enough to handle, thin them to 30cm apart. Throughout the season, keep the soil consistently moist but not waterlogged. Because this variety is compact, place stakes or canes near the stems early in the season to prevent them from snapping in high winds. Use a balanced liquid feed regularly to support the multi-headed growth habit.
