Some growers have used perlite for tomatoes more thanone growing season and it has subsequently been re-used for potting mixesand soil conditioning. If perlite is reused, sterilization may benecessary. Summary Horticultural perlite provides more constantmoisture status around the roots at all times irrespective of weather orstage of root growth. Perlite ensures more even watering throughoutthe growing area. There is less likelihood of over-wateringwith horticultural perlite.
Perlite culture avoids wastage of water andnutrients.
The use of perlite eliminates the need tograde growing floors accurately.