Schedule Crop - Delphinium Blue Donna

Delphinium Blue Donna

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
A light Sumagic spray when the flower spike is 4"-6" tall can reduce overall container height.

Week color desired

Sow week

Plug transplant week

Early Spring

Quart
(1 ppp)

Gallon
(1 ppp)

Spring/Summer

Quart
(1 ppp)

Gallon
(1 ppp)

Delphinium Blue Donna

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Germination
Seed Form:	RAW
PlugSize:	288
Seeds/Cell:	1
Plug Crop Weeks:	6-8
Days from 50% to maximum germination:	7-10
Cover Seed:	Yes

Plug Production
Stage 1
Moisture:	Level 4
Temperature:	68-72°F (20-22°C)
Light:	Optional

Stage 2
Moisture:	Level 3
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:	65-68°F (18-20°C)
Light:	6-8 mol·m⁻²·d⁻¹
Fertilizer:	100 to 175 ppm N (0.7 to 1.2 EC)

Stage 4
Moisture:	Level 2
Temperature:	60-65°F (16-18°C)
Light:	6-8 mol·m⁻²·d⁻¹
Fertilizer:	100 to 175 ppm N (0.7 to 1.2 EC)

Vernalization:	No
Propagation Key Tips:	For forcing info: See Perennials Forcing Guide. Spray damp-off fungicide.

Growing on to Finish
Growing on Temperature:	(day) 65-70°F (18-21°C) (night) 57-60°F (14-16°C)
Target Media pH/EC (1:2):	5.8-6.2 pH 1.3-1.6 mmhos/cm
Fertilizer:	175 to 225 ppm N (1.2 to 1.5 EC)
Daylength:	Day Neutral
Fertilizer Notation:	Container production: Fertilize every other irrigation with 15-0-15 at 150 to 200 ppm.
Finishing Key Tips:	See Cut Flower section for cut flower production for both field and greenhouse. Monitor for Powdery Mildew.