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Process flow of loblolly pine seed production (Adapted from) (A), nursery raising (B), field planting (C), and early growth (D). The possible occurrence of cold and drought events resulting in an elevated risk of stress is indicated in blue and orange respectively.
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F2
Seeds are typically sown after the risk of frost is past in the location of each nursery, so the first significant risk of cold exposure comes in the fall when the seedlings are 5- to 6 months old (Figure 2B). For planted forests, it is during the first year following field establishment that the crop is most vulnerable to cold and drought stress (Figure 2C).
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