Green Twister

Family: Asteraceae Herb

Planting Schedule

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Green Twister blooms with an arresting, chartreuse twist—petals that curl and spiral around a tightly domed center, giving each flower a sculptural, lime-green glow.

As the season advances, the texture turns from fresh, springy petals to a sturdier, seed-ready presence, making it as captivating in the garden as it is in bouquets. Grow Green Twister for long-lasting perennial color and a pollinator magnet that keeps the border lively from early summer into fall.

Light: Full SunMaturity: 70 DaysHabit: Upright

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Green Twister Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Apr 20th	Aug 10th	Oct 19th – Jul 15th
Zone 1b	Apr 6th	Jul 27th	Oct 5th – Aug 1st
Zone 2a	Mar 30th	Jul 20th	Sep 28th – Aug 29th
Zone 2b	Mar 20th	Jul 10th	Sep 18th – Aug 25th
Zone 3a	Mar 20th	Jul 10th	Sep 18th – Sep 1st
Zone 3b	Mar 24th	Jul 14th	Sep 22nd – Sep 21st
Zone 4a	Mar 20th	Jul 10th	Sep 18th – Sep 24th
Zone 4b	Mar 18th	Jul 8th	Sep 16th – Sep 27th
Zone 5a	Mar 13th	Jul 3rd	Sep 11th – Sep 30th
Zone 5b	Mar 9th	Jun 29th	Sep 7th – Oct 5th
Zone 6a	Mar 6th	Jun 26th	Sep 4th – Oct 10th
Zone 6b	Feb 28th	Jun 20th	Aug 29th – Oct 16th
Zone 7a	Feb 23rd	Jun 15th	Aug 24th – Oct 20th
Zone 7b	Feb 13th	Jun 5th	Aug 14th – Oct 28th
Zone 8a	Feb 4th	May 27th	Aug 5th – Nov 5th
Zone 8b	Jan 26th	May 18th	Jul 27th – Nov 12th
Zone 9a	Jan 9th	May 1st	Jul 10th – Nov 26th
Zone 9b	Dec 15th	Apr 6th	Jun 15th – Dec 9th
Zone 10a	—	Oct 1st	Dec 10th – Feb 28th
Zone 10b	—	Oct 1st	Dec 10th – Feb 28th
Zone 11a	—	Oct 1st	Dec 10th – Feb 28th
Zone 11b	—	Oct 1st	Dec 10th – Feb 28th
Zone 12a	—	Oct 1st	Dec 10th – Feb 28th
Zone 12b	—	Oct 1st	Dec 10th – Feb 28th
Zone 13a	—	Oct 1st	Dec 10th – Feb 28th
Zone 13b	—	Oct 1st	Dec 10th – 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)	40
Min Night Temp (°F)	40
Harden Off (days)	7

Culinary Notes

Chef's Note

Echinacea petals can bring an assertive, herbal bite—more akin to a gritty tea infusion than a sweet flower. Use it like you would a bitter herb: controlled, lightly dosed, and paired with honey/citrus to keep the flavor from getting harsh.

Best Uses

infuse petals into small-batch tea syrups or cocktails where the bitterness can stand up
use fresh petals sparingly as a sharp, garnishing “leafy” accent over citrusy salads
brew dried petals for a robust, tannic-style infusion

Flavor Profile

earthy, herbal bitterness subtle tea-like resin notes petal texture ranges from springy to tougher as it matures

Kitchen Pairings

lemon honey ginger black tea citrus zest

Frequently Asked Questions

What’s the most common pest or disease for Echinacea purpurea (purple coneflower) and how can I prevent or treat it?

Watch for powdery mildew, which shows up as a white coating on Echinacea leaves during warm, humid weather or if plants are crowded. Improve airflow by spacing plants (about 12–18 in / 30–45 cm) and water at the soil line rather than overhead; remove heavily affected leaves early. If it spreads, treat with a labeled fungicide for powdery mildew on ornamentals and repeat as directed at the first signs, not after leaves are fully coated.

How often should I water Echinacea purpurea during the main growing phase?

During active growth and flowering, keep soil evenly moist but not soggy—aim for watering when the top 1 in (2–3 cm) of soil feels dry. Typically this means about 1 in (2.5 cm) of water per week from rain and/or irrigation, with deeper watering rather than frequent light sprinkles. Once established, Echinacea tolerates some drought, but letting it repeatedly dry out can reduce flower size.

How do I tell when Echinacea purpurea is ready to harvest?

Harvest the seed heads (for drying) when the central cone is fully darkened and the tiny seeds are mature—often when most of the bracts around the cone look papery and dry. You can also cut flowers for bouquets when the petals are fully open and the central cone is firm, typically about 70 days from sowing under good conditions. For seed collection, wait until seeds are easily released from the cone and dry the heads indoors if they’re still slightly moist.