- American sycamore needs no dormancy, and pregermination treatments are usually not required for prompt germination. Germination rate of sycamore can be increased by treating with gibberellin (GA3) at 100 to 1,000 mg/l.
- American sycamore needs no dormancy, and pregermination treatments are usually not required for prompt germination. Germination rate of sycamore can be increased by treating with gibberellin (GA3) at 100 to 1,000 mg/l.
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