Schedule Crop - Penstemon Electric Blue

Penstemon Electric Blue

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
Can be susceptible to fusarium root rot. No PGR's necessary.

Week color desired

Sow week

Plug transplant week

Early Spring

Quart
(1 ppp)

Gallon
(3 ppp)

Overwintering beneficial. Require high light intensity for uniform flowering.

Spring/Summer

Quart
(1 ppp)

Gallon
(3 ppp)

Overwintering beneficial. Require high light intensity for uniform flowering.

Penstemon Electric Blue

Visit website for variety description and resources.

Germination
Seed Form:	RAW
PlugSize:	288
Seeds/Cell:	1
Plug Crop Weeks:	4-5
Days from 50% to maximum germination:	8-10
Cover Seed:	No

Plug Production
Stage 1
Moisture:	Level 4
Temperature:	65-74°F (18-23°C)
Light:	Optional

Stage 2
Moisture:	Level 3
Temperature:	65-68°F (18-20°C)
Light:	2,000-2,500 fc (21,500-26,900 Lux)
Fertilizer:	100 to 175 ppm N (0.7 to 1.2 EC)

Stage 3
Moisture:	Level 2
Temperature:	60-65°F (16-18°C)
Light:	3,000-4,000 fc (32,300-43,100 Lux)
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:	4,000-5,000 fc (43,100-53,800 Lux)
Fertilizer:	100 to 175 ppm N (0.7 to 1.2 EC)

Vernalization:	No - but beneficial; cooled plants flower more uniformly and faster than non-cooled plants; duration of 10 weeks at 41°F (5°C)
Propagation Key Tips:	Needs active growing climate.

Growing on to Finish
Growing on Temperature:	(day) 66-70°F (19-21°C) (night) 62-66°F (17-19°C)
Target Media pH/EC (1:2):	5.8-6.5 pH 1.0-1.5 mmhos/cm
Fertilizer:	100 to 175 ppm N (0.7 to 1.2 EC)
Daylength:	Day Neutral
Daylength Notation:	Needs high light intensity for complete, rapid and uniform flowering.
Fertilizer Notation:	Apply fertilizer at rate 2 to 3 (150 to 225 ppm N/1.1 to 1.5 mmhos/cm EC) from nitrate-based fertilizer. Avoid high ammonium level.
Finishing Key Tips:	Bulking prior to vernalisation ensures pot-fill and improves flowering uniformity. Monitor for Whiteflies.