Wave Yellow

Petunia

Zone 11b Save Garden

🌱 70d to harvest Spreading

A living ribbon of color, Wave Yellow pours from the pot in a soft, trailing cascade of warm golden blooms that glow like late-su…

Crop Dates

Milestone	Date
Start Indoors	Oct 23rd
Last Frost	Jan 1st
Transplant / Sow Outdoors	Jan 15th
Harvest Begins	Mar 26th
Harvest Ends	Dec 31st

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Full Sun
Growth Habit	Spreading
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	75
Min Soil Temp (°F)	50
Min Night Temp (°F)	50
Harden Off (days)	7

Recommended Companions

Moonsong Deep Orange Marigold

Marigold Marigold

Surfinia White Petunia

Lemon Gem Marigold

Surfinia Sky Blue Petunia

Surfinia Heavenly Blue Petunia

Frequently Asked Questions

What pest or disease most often affects Petunia × atkinsiana (Shock Wave Yellow/Wave Yellow), and what should I do?

Petunias commonly suffer from aphids and occasionally botrytis/gray mold when foliage stays wet. Check undersides of leaves weekly; hose off aphids or spot-treat with insecticidal soap, and remove any gray-moldy blossoms or leaves immediately. Keep plants in full sun with good airflow and avoid overhead watering to prevent recurrence.

How often should I water Petunia × atkinsiana during peak growth?

During the main growth phase, water thoroughly only when the top 1 inch of soil feels dry—usually every 2–3 days in hot weather, but less in cooler conditions. Petunias in containers often need more frequent checks because the pot dries faster; maintain evenly moist (not soggy) soil to prevent wilting and root stress.

How can I tell when Wave Yellow (Petunia × atkinsiana) is ready to harvest?

Petunia × atkinsiana is typically grown for nonstop blooms rather than a traditional harvest, and it’s ready to “harvest” flowers as soon as the first buds open. For best continued flowering, deadhead spent blooms daily or every 2–3 days; stop when plants are clearly slowing after the season’s peak.

A living ribbon of color, Wave Yellow pours from the pot in a soft, trailing cascade of warm golden blooms that glow like late-summer sunlight. Each flower is velvety in appearance with a gently ruffled edge, offering a delicate, luminous presence that looks especially striking against the plant’s deep green foliage. Ideal for trailing over containers and spilling from hanging baskets, Wave Yellow brings a long season of showy color to patios, walkways, and sunny window boxes.

Sowing Tips

Transplant Conditions

Wait until soil reaches 50°F and nights stay above 50°F before moving outdoors. Harden off for 7 days first.

Expert Note

Start early because petunias are slow to establish; transplant after nights are reliably warm for best branching and faster bloom.