Best SOIL nutrients- for Pollination ONLY!

What do you feel are the best or at least high up there. This is in breeding chambers for hybridization of plants. SOIL grow planned (open to hydro if better). Thanks in advance for your help and can't wait to hear back!

Food is food.

promix/Organicare crumbles or Botanicare liquid line. hands down. if anyone posts differently they just want you to fail.