Schedule Crop - Penstemon barbatus Rock Candy®

Penstemon barbatus Rock Candy^®

Data is gathered from our West Grove, Pa., trials (Zone 6a). Southern growers: expect 1-2 weeks earlier finishing. Northern growers: 1 week slower. Consider summertime scheduling accurate. Dates based on a standard 72 liner size.

Week color desired

URC stick week

Liner transplant week

Spring/Summer

Gallon
(1 ppp)

Late-Summer/Fall

Gallon
(1 ppp)

*Plantings after week 25 finish faster

Penstemon barbatus Rock Candy® Purple

Penstemon barbatus Rock Candy® Blue

Penstemon barbatus Rock Candy® Light Pink

Penstemon barbatus Rock Candy® Pink

Penstemon barbatus Rock Candy® Ruby

Visit website for variety description and resources.

Propagation Guide
Media EC/pH:	EC 0.75-0.80 mmhos/pH 5.8-6.2
Soil Temperature:	70-72°F (21-22°C)
Rooting Hormone:	500 ppm IBA
Mist:	Moderate to high for first 24 hours, then reduce to low.
Fertilization:	50-75 ppm N
Pinching:	Recommended.
Transplanting:	35-42 days after sticking
Comments:	Use low mist settings; do not oversaturate rooting media. Root zone temperatures of 70°F (21°C).

Finishing Guide
Media pH:	5.8-6.2
Temperature:	Nights: 55 to 70°F (13 to 21°C) Days: 60 to 80°F (15 to 27°C)
Light Level (fc):	3,000 to 5,000
Vernalization:	No
Daylength:	Long day facultative
Watering:	Allow media to dry moderately between watering.
Fertilization:	Use a balanced fertilizer at a rate of 150 to 175 ppm N.
Pinch After Transplant:	Yes
Plant Growth Regulators:	PGRs generally not needed
Pests and Fungal Diseases:	Spider mites, thrips. Watch for INSV/TSWV.