Very Limited Anecdotal Evidence/Coincidence, but...

[camille1585]

Originally Posted by isurus79

Assuming the hypothesis of longer lasting blooms is valid, any idea what the mechanism would be?

Seeing as Kelpak is a natural cocktail of hormones, a possible mechanism is crosstalk between various phytohormonal pathways. This is extremely well studied in relation to plant development and plant defenses. Increased levels of one hormone can inhibit or increase others, or act synergistically. Ethylene and abscissic acid are the two main phytohormones involved in flower aging, and other hormones like cytokinins and gibberellins will have an opposite effect and delay senescence.

[isurus79]

Originally Posted by camille1585

Seeing as Kelpak is a natural cocktail of hormones, a possible mechanism is crosstalk between various phytohormonal pathways. This is extremely well studied in relation to plant development and plant defenses. Increased levels of one hormone can inhibit or increase others, or act synergistically. Ethylene and abscissic acid are the two main phytohormones involved in flower aging, and other hormones like cytokinins and gibberellins will have an opposite effect and delay senescence.

Huh, that sounds absolutely fascinating!

[thefish1337]

I didn't come up with the tomato thing myself by the way. It's on the website! Not surprising the technical director of the company has been experimenting with it because they recommend spraying flowers for grapes as well.

When you transplant your tomatoes do one root drench at 1:100 and then follow up with 3 foliar sprays every two weeks afterwards- thank me later!

Kelpak on Tomatoes