Italian White
Sunflower
🌱 70d to harvest
Upright
Warm, luminous petals—creamy Italian White with a soft, buttery glow—open to bold, sun-catching faces that seem to hold the light…
Crop Dates
| Milestone | Date |
|---|---|
| Start Indoors | Direct Sow |
| Last Frost | May 13th |
| Transplant / Sow Outdoors | May 13th |
| Harvest Begins | Jul 22nd |
| Harvest Ends | Sep 27th |
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) | 35 |
| Harden Off (days) | Not Required |
Recommended Companions
Frequently Asked Questions
What pest or disease most commonly affects Helianthus annuus (Italian white) and how do I manage it?
Watch for downy mildew and rust, which show up as yellowing leaf patches or orange-brown pustules that spread quickly in humid weather. Remove and discard badly infected leaves early, improve airflow by spacing plants, and avoid overhead watering so foliage stays dry. If you see rapid spread, apply a labeled fungicide for sunflower rust/downy mildew and repeat according to the label timing.
How often should I water Italian white sunflower during its main growing phase?
During the active growth and bud-to-bloom period, keep soil consistently moist but not waterlogged—about 1 inch (2.5 cm) per week total, adjusted for heat and wind. Water deeply when the top 1–2 inches of soil feel dry, because shallow watering encourages shallow roots. Inconsistent watering around flowering can lead to smaller heads and uneven filling.
How can I tell when Helianthus annuus (Italian white) is ready to harvest?
Harvest when the back of the flower head turns yellow to brown and the bracts feel dry, and the seeds are plump with their mature color. For Italian white (for seed), wait until the head looks fully developed and the outer seeds detach easily when rubbed. Cut the heads, then dry them further in a warm, airy place until seeds are hard and fully dry to prevent mold.
Warm, luminous petals—creamy Italian White with a soft, buttery glow—open to bold, sun-catching faces that seem to hold the light. The centers are richly textured and inviting, with a sturdy, upright presence that makes a striking statement in beds and borders. Grow Italian White for its long, showy bloom span and pollinator magnetism—ideal for fresh garden color and abundant backyard wildlife visits.
Sowing Tips
Transplant Conditions
Wait until soil reaches 55°F and nights stay above 35°F before moving outdoors.
Expert Note
Sow after frost danger with full sun and thin to strong spacing for larger blooms.