Trailing Petunia ‘BOOM!™ TR White’ F1 is an excellent choice for gardeners seeking a classic, elegant display for hanging baskets, balcony boxes, or tall planters. This compact variety reaches a height of about 30 cm and forms a dense, cascading canopy covered profusely in snow-white blossoms.
A key advantage of this variety is its exceptional rain tolerance—unlike many delicate summer annuals, ‘BOOM!™ TR White’ flowers retain their beauty even after heavy summer showers. The seeds are pelleted to simplify sowing and germination. This means each tiny seed is coated in a special clay-and-nutrient layer, forming a small granule. This treatment makes handling, precise placement, and reliable germination of the naturally dust-fine petunia seeds significantly easier and more dependable.
Usage and Cultivation Instructions:
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Sowing Time: Start indoors or in a heated greenhouse from February to March.
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Sowing: Sow pelleted seeds individually in seed plug trays or small pots using fine-textured seed-starting compost.
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Sowing Depth: NOTE! Petunias require light to germinate. Do not cover pelleted seeds with soil. Press them only lightly onto the moist soil surface.
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Germination: Keep the soil consistently moist (use a spray bottle). Optimal germination temperature is 20–24 °C. Cover the container with glass or clear plastic, ventilating daily to prevent mold.
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Pricking Out and Planting: When seedlings develop their first true leaves, prick out (transplant) into larger pots. Plant outdoors in open ground or outdoor containers only after all danger of frost has passed (typically late May to early June).
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Soil Requirements: Prefers a warm, sunny, sheltered location with nutrient-rich, well-draining soil.
Tips and recommendations:
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During early spring sowing in northern latitudes, natural light is often insufficient in February and March. Use grow lights to prevent seedlings from becoming leggy.
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To ensure and prolong abundant flowering, regularly remove spent blooms along with their seed pods.
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Trailing petunias are heavy feeders. To maintain continuous, lush blooming, fertilize regularly (e.g., every 1–2 weeks) with a liquid fertilizer formulated for flowering annuals.