Rick
Well-Known Member
The whole process of bloom initiation, growth, fertilization and ripening of the seeds is governed by plant hormones. Allowing the plant to carry a capsule to maturity completes the hormone cycle of reproduction and that sends some plants the signal that it's time to die now.
Cutting a spike at any point distrupts the reproductive hormone cycle and the plant's response, now that it cannot reproduce, is to keep growing and try to bloom again.
Cutting the flowerstem on a small or weak Phrag, or cutting the flower before a capsule is able to form, interupts the reproductive cycle and that sends the (hormonal), message to the plant to rev up and grow more foliage, instead of wimp out, give up and wither away because it's job of reproduction is done.
There's another way to look at this. Once the plant is blooming , the blooming action is expending nutrients and energy. Starting a capsule is essentially the same (energy wise) for an orchid as cutting the spike. It should truly produce a hormonal signal that "flowering energy and resources are no longer needed", and should start it on the path of producing a new growth while the capsule takes care of itself.
Yes, its job of luring a pollinator in for sexual reproduction is now done and it can proceed to asexual budding now that the blooming switch has been turned to off with pollination.