Chianti

Sunflower

70d to harvest

Velvety, wine-kissed petals unfurl in bold, sun-facing heads—Chianti brings a dramatic blend of warm amber and deep garnet tones that feels almost luminous at golden hour. The blooms hold a sturdy, upright presence with a satisfying, substantial texture, making each flower a standout centerpiece in the garden. Grow Chianti for striking cut-flower impact and pollinator-friendly color that draws bees and butterflies from the first open to the last.

Crop Dates

Growing note: In frost-free Zone 10a, grow this cool-season crop during the cooler dry season (October–February).

Milestone	Date
Start Indoors	—
Climate	Frost-Free Climate
Transplant / Sow Outdoors	Oct 1st
Harvest Begins	Dec 10th
Harvest Ends	Feb 28th

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	55
Min Night Temp (°F)	40
Harden Off (days)	Not Required

Frequently Asked Questions

What pest or disease problem is most common on Helianthus annuus (sunflower) and how can I control it?

Sunflowers (Helianthus annuus) are commonly hit by sunflower rust (Puccinia helianthi), which shows up as yellow spots that turn into rusty-orange pustules on leaves. Remove and discard heavily affected leaves early, improve airflow by spacing plants, and avoid overhead watering so foliage stays dry. If it’s spreading fast, use a labeled fungicide for rust on sunflowers and repeat according to the label during warm, humid weather when rust peaks.

How often should I water Chianti sunflowers during the main growing phase?

During the main growth phase (after establishment and leading up to bloom), keep soil evenly moist but not soggy—aim for watering when the top 1–2 inches of soil dry out. Typically this means about 1 inch of water per week from rainfall plus irrigation, increasing slightly during hot, windy periods. If leaves wilt in the afternoon but perk up overnight, water deeply; if the soil stays wet and leaves stay yellow or droop, cut back to prevent root stress and fungal issues.

How do I tell when Chianti (Helianthus annuus) is ready to harvest?

Harvest when the back of the flower head turns yellow to brown and the outer petals have mostly died back. For seed harvest, check that the bracts are dry and tight and that the seeds feel firm; you should see a mature seed color typical for the variety while the head is still attached. Cut the heads in the morning and dry them further in a well-ventilated, dry area before removing seeds fully.