SproutSmart
SproutSmart™ Intelligent Garden Sowing

Classic Magic

Family: Asteraceae Flower
Zone 6b Save Garden

Planting Schedule

Add Classic Magic to your garden to build a schedule and get reminders.

Classic Magic opens with a velvety rush of color—silken, sky-blue to violet blooms that look as if they’ve been dusted with starlight.

Each flower carries a crisp, papery texture and a tidy, upright charm, holding its form beautifully from bud to full display. Grow Classic Magic for abundant cut-flower style blossoms and pollinator-friendly garden drama that keeps the landscape lively for weeks.

Light: Full SunMaturity: 70 DaysHabit: Upright

Botanical illustration of Classic Magic

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

MilestoneDate
Start IndoorsMar 14th
Last FrostApr 25th
Transplant / Sow OutdoorsApr 18th
Harvest BeginsJun 27th
Harvest EndsOct 16th

Crop Details

TraitValue
Days to Maturity70
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)40
Min Night Temp (°F)28
Harden Off (days)7

Frequently Asked Questions

What pest or disease most commonly affects cornflower (Centaurea cyanus), and how can I manage it?
Cornflower is prone to fungal issues like powdery mildew and leaf spotting, especially when plants are crowded and nights stay damp. Space plants for airflow, avoid wetting foliage when watering, and remove heavily affected leaves; if it spreads, switch to an appropriate fungicide labeled for ornamentals in the Asteraceae family and apply according to label timing.
How often should I water cornflower during the main growing phase?
During active growth (from when plants are established until flowering begins), keep the soil evenly moist but not soggy—about 1 inch (2.5 cm) of water per week, adjusted for heat and wind. Water at the base in the morning and let the top 1–2 inches (2.5–5 cm) of soil dry slightly between waterings to prevent disease.
How do I know when cornflower (Centaurea cyanus) is ready to harvest?
Harvest when the flower heads are fully colored and open (typically around 70 days from sowing). Snip stems early in the day, before petals start to fade, and use the blossoms fresh or dry promptly for best color.

Today's Conditions

Outdoor planting for Classic Magic in Zone 6b typically begins around 2026-04-18. Wait until soil reaches at least 40°F before transplanting Classic Magic.

Garden Alerts

In Zone 6b, the average last spring frost is around April 25. Watch soil temperature before transplanting Classic Magic.

Today's Conditions

Outdoor planting for Classic Magic in Zone 6b typically begins around 2026-04-18. Wait until soil reaches at least 40°F before transplanting Classic Magic.

Garden Alerts

In Zone 6b, the average last spring frost is around April 25. Watch soil temperature before transplanting Classic Magic.

Sowing Tips

Transplant Conditions

Wait until soil reaches 40°F and nights stay above 28°F before moving outdoors. Harden off for 7 days first.

Expert Note

For the best bicolor display, sow in full sun and avoid over-fertilizing—corners of stress often produce more floriferous plants.