This sounds very woo-wooish. Is there any sense in this?
From SonicBloom.com
Q: To begin, what exactly is SONIC BLOOM?
A: SONIC BLOOM is a revolutionary new system to enhance plant growth naturally. Dan Carlson, a research scientist, has developed a concept which involves the unique combination of sound and a specially developed foliar spray.
Q: Yes, but how does it actually work?
A: The special sound is made up of harmonic frequencies which stimulate the tiny pores on plant leaves to open. When these pores, called stomata, are open, the plant is able to increase its uptake of SONIC BLOOM balanced nutrient by over 700%.