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Bonanza Harmony

Family: Asteraceae Flowering annual
Zone 6b Save Garden

Planting Schedule

Add Bonanza Harmony to your garden to build a schedule and get reminders.

Sunlit, velvety blooms arrive in a rich tapestry of warm gold and burnished amber, often with harmonizing flashes of deeper tones at the petal tips.

Bonanza Harmony’s flowers carry a dense, ruffled texture that holds its form beautifully in the garden, offering a long season of color from early summer through fall. Ideal for beds, borders, and containers, this French marigold creates an instantly uplifting display that thrives with simple care and rewards you with continuous, showy flowering.

Light: Full SunMaturity: 70 DaysHabit: Upright

Botanical illustration of Bonanza Harmony

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

Crop Dates

MilestoneDate
Start IndoorsMar 28th
Last FrostApr 25th
Transplant / Sow OutdoorsApr 25th
Harvest BeginsJul 4th
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)55
Min Night Temp (°F)50
Harden Off (days)7

Frequently Asked Questions

What pest or disease problem is most common on Tagetes patula (French marigold) and how do I treat it?
French marigolds are especially prone to aphids that cluster on new growth and buds, and they can also develop powdery mildew in humid, crowded planting. Blast aphids off with a strong stream of water and, if needed, spot-treat with insecticidal soap on affected areas early in the day. Improve airflow by thinning to recommended spacing and remove heavily affected leaves to reduce mildew spread.
How often should I water Tagetes patula during the main growing phase?
During active flowering growth, keep the soil consistently moderately moist, not soggy—water when the top 1 inch of soil feels dry. In full sun beds, this often means about 1–2 deep waterings per week, increasing slightly during hot spells. Avoid wetting the foliage, which raises the risk of mildew.
How can I tell when Bonanza Harmony French marigolds (Tagetes patula) are ready to harvest?
Harvest when the flowers are fully formed and brightly colored, typically around 70 days from sowing/early growth for this type. Pick blooms in the morning when petals are open and dry, and deadhead regularly to keep new buds forming throughout the season.

Today's Conditions

Outdoor planting for Bonanza Harmony in Zone 6b typically begins around 2026-04-25. Wait until soil reaches at least 55°F before transplanting Bonanza Harmony.

Garden Alerts

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

Today's Conditions

Outdoor planting for Bonanza Harmony in Zone 6b typically begins around 2026-04-25. Wait until soil reaches at least 55°F before transplanting Bonanza Harmony.

Garden Alerts

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

Sowing Tips

Transplant Conditions

Wait until soil reaches 55°F and nights stay above 50°F before moving outdoors. Harden off for 7 days first.

Expert Note

For the best dense, double blooms, keep plants in full sun and avoid over-fertilizing with high nitrogen—light feeding promotes flowers.