SproutSmart
SproutSmart Intelligent Garden Sowing

Soraya

Sunflower

Planting Schedule

Add Soraya to your garden to build a schedule and get reminders.
Botanical illustration of Soraya
70d to harvest

Warm golden petals unfurl with a radiant, honeyed glow, framing a deep, chocolate-brown center that feels richly textured at every glance. Soraya’s blooms are bold and upright, with sturdy stems that hold their presence from garden to vase, and its dense seed head promises a satisfying, nutty harvest for seed oil and bird-friendly enjoyment. A standout for pollinators, Soraya brings long-lasting summer color and a dramatic focal point—ideal for borders, back rows, and sunny corners where you want beauty that keeps returning.

Crop Dates

MilestoneDate
Start IndoorsDirect Sow
Last FrostMar 6th
Transplant / Sow OutdoorsMar 6th
Harvest BeginsMay 15th
Harvest EndsNov 26th

Crop Details

TraitValue
Days to Maturity70
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)55
Min Night Temp (°F)45
Harden Off (days)Not Required

Frequently Asked Questions


Why are my Helianthus annuus (sunflower) leaves turning yellow or getting spots, and what should I do?
Common problems include downy mildew and Alternaria leaf spot, which show up as yellowing with irregular spots or gray/brown blotches on foliage. Remove and discard the worst leaves, water at the soil line (not overhead), and space plants so air can circulate. If it’s actively spreading, use a labeled fungicide for sunflowers and repeat according to the label at the first signs of spots.
How can I tell when my Helianthus annuus is ready to harvest (about 70 days)?
Harvest when the back of the flower head turns yellow to brown and the outer petals are mostly dry and dropped. Seeds should look plump and firm, and you should be able to loosen a test seed from the head easily. Cut the heads with 6–12 inches of stem and dry them in a warm, airy place for best seed quality.
Botanical illustration of Soraya

Warm golden petals unfurl with a radiant, honeyed glow, framing a deep, chocolate-brown center that feels richly textured at every glance. Soraya’s blooms are bold and upright, with sturdy stems that hold their presence from garden to vase, and its dense seed head promises a satisfying, nutty harvest for seed oil and bird-friendly enjoyment. A standout for pollinators, Soraya brings long-lasting summer color and a dramatic focal point—ideal for borders, back rows, and sunny corners where you want beauty that keeps returning.