When Your Plants Arrive

The trio of starter plants should be planted immediately upon arrival. Up to three starter plants may be planted together in an 8‑to‑12‑inch container. Do not remove the compostable paper lining when transplanting to protect and aerate the roots.

Potted Firefly Petunias arrive ready for display. No immediate repotting is necessary, and they can comfortably grow in their ceramic home. If the glow is faint upon arrival, provide several days of sunlight to fuel the plant's metabolic momentum and bioluminescence.

Fertilizer

Petunias are heavy feeders and thrive on regular fertilization. Use the included sample of Light Bio Petunia Nutrition, specially formulated with essential micronutrients for healthy growth and an optimal glow.

A single packet makes a gallon of solution and can be stored for months away from sunlight. If using an alternative fertilizer, choose a petunia-specific formulation with chelated iron.

Deadheading and Pruning

While Petunias bloom continuously, removing spent flowers keeps plants looking tidy and encourages new growth. Trim back leggy or browning growth to promote fresh, bushy growth and renewed blooming.

Regularly removing older blooms also maximizes the glow; new flower buds and stems emit the most intense light, and clearing away faded flowers ensures their glow is never hidden.

Spacing

Plant Firefly Petunias about 6 to 8 inches apart, and the Trial varieties about 8 to 10 inches apart. This ensures adequate air circulation and gives each plant the room it needs to flourish—from the Firefly’s upright blooms to the Trial’s overflowing canopy.

Soil

Use well-draining soil with a neutral to slightly acidic pH. For containers or hanging baskets, choose a high‑quality potting mix containing peat moss and perlite or vermiculite for good drainage.

Sunlight

Light Bio Bioluminescent Petunias thrive in full sun, needing 6 to 12 hours of direct sunlight daily for optimal growth. They can tolerate partial shade, but the bioluminescence may be reduced.

Watering

Maintain consistently moist soil without overwatering. To prevent the plants from drying out, check moisture levels frequently—especially when planted in containers or during hot, dry spells.

Temperature and Humidity

Light Bio Bioluminescent Petunias are suited for spring and summer growing conditions. They grow best when temperatures are cool to warm. Avoid exposing plants to excessive heat or freezing temperatures.

Pest and Disease Management

Monitor for common pests such as aphids, whiteflies, and spider mites. Fungal diseases can be a problem in overly wet or humid conditions; ensure good air circulation around the plants and avoid overhead watering.