The lifting, storage, and transport involved in shipments of evergreen planting stock can have long lasting effects. Planting stress affects root quality, and those effects can last beyond planting and can cause plants to not recover completely. Water is probably the most important factor. The system can be thought of as keeping a checkbook. Each stress subtracts from the quality balance remaining for tree health. Some tree nurseries allow for freezer storage of seedlings that may help preserve moisture in the plants and plant roots. Plugs need different care than bare root stock. Proper planting and care to have roots set properly can avoid J root which will cause long term stress on trees.
- 2012 Gregory Diseases of Christmas Trees  [presentation]
- Rick Bates PSU_2013 Christmas Tree Production and Rhabdocline Needlecast  [presentation]
- Olson Delaware Christmas Tree Workshop April 23, 2013  [presentation]