African Sunset

Petunia

Zone 11b Save Garden

Botanical illustration of African Sunset

🌱 90d to harvest Spreading

A living cascade of color, African Sunset drapes the garden in velvety, sunset-bright blooms that seem to glow from within—warm a…

Crop Dates

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

Crop Details

Trait	Value
Days to Maturity	90
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

Recommended Companions

Taishan Yellow Marigold

Lemon Gem Marigold

Frequently Asked Questions

What pest or disease most commonly affects Petunia × atkinsiana (African Sunset), and how can I treat it?

Petunias are especially prone to aphids and botrytis (gray mold) during cool, humid stretches. For aphids, spray infested growth with insecticidal soap and repeat every 5–7 days until you stop seeing clusters. To prevent botrytis, keep leaves and flowers as dry as possible (water at the soil line) and remove any gray, mushy blooms immediately; if problems persist, use a labeled fungicide for botrytis on petunias.

How often should I water Petunia × atkinsiana during the main growing phase?

During active growth, keep the root zone evenly moist but never waterlogged—aim for top 1 inch of soil to dry slightly between waterings. In full sun and warm weather, this often means watering about 1–2 times per week, but container plants may need more frequent checks. If the soil feels wet or smells sour, slow down to avoid root stress that invites disease.

How do I know when African Sunset (Petunia × atkinsiana) is ready to harvest?

African Sunset is typically grown for continuous flowering rather than a single “harvest,” and flowers are considered ready as soon as buds swell and colors fully open. For best bloom performance, pinch or cut spent flowers when they fade—this is the practical harvest step that triggers new bud formation. If you’re collecting seeds from Solanaceae petunias, let seed pods dry on the plant and harvest only when pods turn papery and begin to split.

A living cascade of color, African Sunset drapes the garden in velvety, sunset-bright blooms that seem to glow from within—warm apricot-orange to ember-red with darker, velvety throats. Each flower carries a soft, slightly ruffled texture and a generous, open trumpet silhouette that invites lingering admiration from spring through fall. Perfect for trailing over containers, window boxes, and hanging baskets, African Sunset brings nonstop showy color to borders and pathways as a spreading annual centerpiece.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 7 days first.

Expert Note

Start petunias early under lights if you want the earliest blooms, then transplant only after nights are reliably warm.