Container:
Premium 1 Gallon Pot
When to Plant:
Late summer
Finish:
10-12 weeks
Notes:
Plant small plugs in late summer, then vernalize.
Container:
Premium 1 Gallon Pot
When to Plant:
Late winter to spring
Finish:
6-8 weeks
Growing Temperature:
60-65° F
Holding Temperature:
50-60° F
Soil PH:
5.8-6.5
EC (What is EC?):
1.5-2.5 pour through method
Fertility:
Feed 100-150 ppm N at each watering.
Vernalization:
Provide 8 weeks of temperatures below 40° F.
Pests & Diseases:
Aphids, thrip, and spider mites are the main pests of Penstemon.
Crown and root rots can be problematic if grown under improper conditions. A fungicide drench is recommended after planting bare root.
Potting & Timing:
Plant small plugs in late summer for bulking purposes.
Bare root is best for quick turn spring crops or larger containers such as 2-3 gallon.
Moisture:
Moderate moisture
Planting Level:
Plant crown even with soil line.
PGRs/Pinching:
Daminozide (B-Nine/Dazide) at 2500 ppm or paclobutrazole (Bonzi) at 5-10 ppm are effective at controlling elongation.
Lighting:
High light levels produce the best looking plants. Direct sunlight outdoors is best for achieving the proper foliage color. Flowers under natural daylengths.