Common Name Goldenrod  
Genus  Solidago
Species S. canadensis
Family Asteraceae
Life Cycle  Hardy Herbaceous Perennial 
Tray Size  50
Plug Care Plant soon after receiving plugs - water well for the first  two weeks after planting to allow the plugs to get  established, then water only when the soil dries. 
Netting / Staking Not necessary 
Temperature Range Hardiness zones 3-9
Spacing 12"
Soil Preference Loose, well draining, amended with organic matter 
Day Length Quantitative long day plant - requires a minimum of 13 hours daylight in order to elongate and flower. Grow in full sun. 
Pinching Yes - pinch approximately 3-5 weeks after planting when the main stem starts to elongate. Cut low on the central stem to encourage strong side shoot development. 
When to Plant Plugs can be planted any time of the year but perform  best when planted in cool conditions - early spring in  most zones. 
Harvesting Harvest when just the top flowers in the inflorescence begin to open. 
Post Harvest Care Cut stems should be placed immediately into cool water. Floral conditioners help to extend vase life. To avoid botrytis in the cooler, dry any residual moisture on the foliage before storing. Can be kept for a few days in the cooler if not needed right away. 
Diseases / Insects Aphids, white fly, leaf miner, caterpillar, powdery mildew, rhizoctonia, agrobacterium 
Bailey's Notes As with any quantitative long day plant, artificial lighting can be used in a greenhouse during the winter months to mimic long day lengths and initiate early flowering. 
Resources Danziger Solidago Production Guide