Campbell-Martínez GE. 2021. Chamaecyparis thyoides. In: Propagation Manual for FL Panhandle Native Plants. Longleaf Pine Chapter, FL Native Plant Society.
Chamaecyparis thyoides
Atlantic white cedar Cupressaceae
Seed Propagation: Collect cones when they turn woody and brown; do not collect cones when they green and fleshy to ensure seed maturity. Seeds are reported to have physical dormancy which can be alleviated by 1-3 months of cold stratification at 4 °C (Jull and Blazich, 2000). Seeds had higher germination at 30/20 °C than 25 °C with an 8/16- hour photoperiod.
Cutting Propagation: Plants are easily propagated from stem cuttings. Apical stem cuttings taken 1/2/2020 had a few ~1-inch long roots on 3/20/2020 and firm rootballs by 5/17/2020. Cuttings were stuck 72-cells with a peat based bagged mix (MeteroMix 830, Sungro) and placed under intermittent mist in a climate-controlled greenhouse.
Production: Plants can be produced using standard greenhouse and nursery procedures. 72-cell rooted plugs placed in 1-gallon pots on 5/17/2020 filled out containers by fall when grown in a 3:1 mix of aged pine bark with fines to peat based bagged mix (MetroMix 830, Sungro) and fertilized with 1tsp of 18-6-12 Osmocote.
Comments: Tall evergreen tree of high ornamental value. May be finicky in the landscape so proper site selection is crucial for long-term success. Plants have a stately appearance and an attractive form.
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Top. Rooted cutting. Bot. Immature cones. Jull and Blazich, 2000. Seed germination of selected provenances of Atlantic white-cedar as influenced by stratification, temperature, and light. HortScience 35:132- 135.