Pinching branch tips enhances fascicle bud growth in southern pines, suggesting season and species influence rooting.
Pinching the branch tips forced fascicle buds into active growth, but only 23 of 6,239 active-budded fascicles rooted when treated with a hormone and inserted in perlite under intermittent mist. Species, age, and season strongly influenced both breaking and rooting.
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Robert C. Hare (1965) studied this question.
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