Seeds Per Dome - Knowledgebase Question

Powell Butte, OR
Question by bradolson
January 30, 2000
I would like to start a number of different varieties of conifer seeds under a dome. I tried to start giant sequoia trees in a 25 (5x5) seed starter kit with a dome. I had a problem misting the needles on the trees as new trees were starting to sprout. Should conifer trees (ponderosa pine, blue spruce, douglas fir, giant sequoia, etc.) be started in individual pots or a smaller dome of 10?


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Answer from NGA
January 30, 2000

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Once the seeds have sprouted you should remove the dome. The top is there just to keep the seedbed moist during the germination process. If you keep the dome on after the seedlings have begun to grow things will be too moist and you'll be inviting the fungal disease called damping-off.

Once the seedlings have emerged, place the trays under a source of artificial light to encourage growth, and thin the seedlings as they grow so there's plenty of room between them to provide good air circulation.

I start my tree seedlings in individual pots, but starting them in a tray is fine, too. When started in peat pots, the entire pot can be planted when the trees have outgrown the space available for their roots. Planting pots and all reduces transplanting stress.

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