more... > Red River > Research > Horticulture > Bumblebee Pollination of Small Greenhouse Tomato Operations Bumblebee pollination of small greenhouse tomato operations may not be the best option, but simple changes made a difference. Reusing Perlite to Grow Greenhouse Tomatoes Sifting and disinfecting used perlite is a simple technique developed at the LSU AgCenter Red River Research Station to recycle perlite for repeat use as a growing media. The recycled perlite was used for 10 years so far with no negative impact on tomato yield. Greenhouse Tomato Production Manual [Image: Tomatoes] This manual is intended to help small greenhouse tomato growers in Louisiana and elsewhere grow a successful crop using perlite or pine bark medium. Small growers can produce vine-ripened, high-quality fruit that can be delivered to the local market on the same day of harvest.