Vermiculite or Perlite? The Definitive Answer - Urban Turnip || If you want to increase the water holding capacity of your potting mix, adding vermiculite is preferable. Perlite is good for improving drainage when it’s used in the right amount (at least 1/3 of the finished mix). Although both perlite and vermiculite work to improve water-retention in dry potting soil, vermiculite is the superior option (assuming that drainage is taken care of). When either perlite or vermiculite are used excl...

Vermiculite or Perlite? The Definitive Answer - Urban Turnip || If you want to increase the water holding capacity of your potting mix, adding vermiculite is preferable. Perlite is good for improving drainage when it’s used in the right amount (at least 1/3 of the finished mix). Although both perlite and vermiculite work to improve water-retention in dry potting soil, vermiculite is the superior option (assuming that drainage is taken care of). When either perlite or vermiculite are used excl...