Schedule Crop - Coreopsis Sunfire

Coreopsis Sunfire

Data is gathered from our Elburn, Ill., trials (Zone 5a) for a North American audience. Warm-climate growers: expect 1-2 weeks earlier finishing. Cool-climate growers: expect 1 week slower. Dates based on standard 288 plug size.

Notes/Pitfall Management
PGR's usually not necessary. Plug growth is easier to manage grown under short days.

Week color desired

Sow week

Plug transplant week

Early Spring

Quart
(1 ppp)

Gallon
(3 ppp)

Spring/Summer

Quart
(1 ppp)

Gallon
(3 ppp)

Late-Summer/Fall

Quart
(1 ppp)

Gallon
(3 ppp)

Coreopsis Sunfire

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Germination
Seed Form:	PRM
PlugSize:	288
Seeds/Cell:	1-2
Plug Crop Weeks:	5-7
Days from 50% to maximum germination:	3-5
Cover Seed:	Light cover

Plug Production
Stage 1
Moisture:	Level 4
Temperature:	65-68°F (18-20°C)
Light:	Optional

Stage 2
Moisture:	Level 3-4
Temperature:	65-68°F (18-20°C)
Light:	6-8 mol·m⁻²·d⁻¹
Fertilizer:	Less than 100 ppm N (Less than 0.7 EC)

Stage 3
Moisture:	Level 2-3
Temperature:	60-65°F (16-18°C)
Light:	8-10 mol·m⁻²·d⁻¹
Fertilizer:	100 to 175 ppm N (0.7 to 1.2 EC)

Stage 4
Moisture:	Level 1-2
Temperature:	60-65°F (16-18°C)
Light:	8-10 mol·m⁻²·d⁻¹
Fertilizer:	175 to 225 ppm N (1.2 to 1.5 EC)

Vernalization:	No
Propagation Key Tips:	Critical Daylength: 13 hours. Short day (10 hours) bulk needed for forcing. For forcing info: See Perennials Forcing Guide. 1 to 2 seeds for 288/3 to 4 seeds for 84. Plug PGRs: For Spring production, no PGRs needed. For Summer production under long day conditions, can use B-Nine/Alar (1,500 to 2,500 ppm spray).

Growing on to Finish
Growing on Temperature:	(day) 60-70°F (16-21°C) (night) 55-60°F (13-16°C)
Target Media pH/EC (1:2):	5.8-6.2 pH 1.5-2.0 mmhos/cm
Fertilizer:	175 to 225 ppm N (1.2 to 1.5 EC)
Daylength:	Obligate Long Day
Daylength Notation:	Long day required – minimum 13 hours.
Finishing Key Tips:	Apply PGRs when buds are visible.