Shock Wave Yellow

Family: Solanaceae Garden Petunia

Planting Schedule

Provide your location or planting zone to unlock dates and add Shock Wave Yellow to a garden.

Sunlit “Shock Wave Yellow” spills over the edge with a vivid, warm butter-yellow bloom that seems to glow even in softer light.

The flowers form a trailing, spreading cascade of velvety petals with a gentle, ruffled flare—lush enough to feel full and abundant at every glance. Ideal for hanging baskets, window boxes, and edging where its trailing habit can drape and bloom continuously through the season.

Light: Full SunMaturity: 70 DaysHabit: Spreading

Botanical illustration of Shock Wave Yellow

Location not set yet

Enter your ZIP for local crop dates

Shock Wave Yellow Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Direct Sow	May 25th	Aug 3rd – Aug 29th
Zone 2b	Direct Sow	May 15th	Jul 24th – Aug 25th
Zone 3a	Direct Sow	May 15th	Jul 24th – Sep 1st
Zone 3b	Direct Sow	May 19th	Jul 28th – Sep 21st
Zone 4a	Direct Sow	May 15th	Jul 24th – Sep 24th
Zone 4b	Direct Sow	May 13th	Jul 22nd – Sep 27th
Zone 5a	Direct Sow	May 8th	Jul 17th – Sep 30th
Zone 5b	Direct Sow	May 4th	Jul 13th – Oct 5th
Zone 6a	Direct Sow	May 1st	Jul 10th – Oct 10th
Zone 6b	Direct Sow	Apr 25th	Jul 4th – Oct 16th
Zone 7a	Direct Sow	Apr 20th	Jun 29th – Oct 20th
Zone 7b	Direct Sow	Apr 10th	Jun 19th – Oct 28th
Zone 8a	Direct Sow	Apr 1st	Jun 10th – Nov 5th
Zone 8b	Direct Sow	Mar 23rd	Jun 1st – Nov 12th
Zone 9a	Direct Sow	Mar 6th	May 15th – Nov 26th
Zone 9b	Direct Sow	Feb 9th	Apr 20th – Dec 9th
Zone 10a	Continuous Production
Zone 10b	Continuous Production
Zone 11a	Continuous Production
Zone 11b	Continuous Production
Zone 12a	Continuous Production
Zone 12b	Continuous Production
Zone 13a	Continuous Production
Zone 13b	Continuous Production

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Full Sun
Growth Habit	Spreading
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	7

Frequently Asked Questions

What pest problem is most common on Petunia × atkinsiana (Shock Wave Yellow), and how do I treat it?

Petunias are often hit by aphids, which cluster on new growth and can cause sticky leaves and curled tips. Spray plants with insecticidal soap or horticultural oil, focusing on the undersides of leaves, and repeat every 5–7 days until new growth is clear. If you see heavy buildup early in the season, remove the most infested tips to reduce the colony.

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

During the main growing period, water when the top 1 inch of soil feels dry, then water thoroughly so the root zone is evenly moist. In full sun, Shock Wave Yellow often needs watering about 1–2 times per week, but containers may require more frequent checks to avoid drying out completely. Avoid keeping soil soggy because petunias in wet conditions are more prone to root and crown issues.

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

For petunias, harvest is typically “cutting back” rather than picking fruit: start harvesting (deadheading/cutting stems) as soon as you see spent blooms at about 70 days from sowing, continuing weekly. Ready blooms to remove are those that look faded and no longer open, and you’ll also get a better flush when you cut back leggy stems to just above a healthy leaf node. Continue until the plant maintains steady flowering and reduced spent blooms after each cutting.