Summer Wine® Ninebark Physocarpus opulifolius
pH:
B (5.6 - 6.2)
B (0.6 - 0.9)
Medium (150 - 200 ppm)
Medium
High
Moderate to Moist
B (65 - 72º Fahrenheit)
A (60 - 65º Fahrenheit)
A (40 - 50º Fahrenheit)
Spring to Fall Finish, 1 ppp
Starting Materials:
Liners
6" and Gallon Pot : 2.25": 8-10 weeks; Quick Turn: 4-6 weeks
10-12" and Two Gallon Pot : 2.25": 12-16 weeks
18" and Three Gallon Pot : 2.25": 16-20 weeks; Quick Turn: 12-16 Weeks
Over Wintering Temperature:
Polyhouse - No Heat Frequent light pruning will produce a full bodied container. Similar to producing a Spiraea like mounding container.
Powdery Mildew can be problematic. Spider Mites are also common and should be treated as needed.
Grower Tips:
High container soil temps may require the use of shade. In the landscape the plant tolerates the high summer temperatures just fine. Very tough, will withstand acid and alkaline soils, and dry situations.
Finishing cool outdoors will intensify foliage color. -plants will tend to defoliate when dried down manage moisture carefully.
Vernalization:
Cold Required 
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