Espoma 25 lb. Bag Bio-Tone Starter 4-3-3 brand_micro-grow venting and more

venting and more

(2) Horizontal airflow fans (HAFs)

With the ability to warm 10-20°F over ambient temperature

Includes two screened vents to keep out insects and debris

The cycles can repeat immediately or after a programmed delay of 1 minute to 4 hours

Espoma 25 lb. Bag Bio-Tone Starter 4-3-3 brand_micro-grow venting and moreAn all natural plant food enhanced with bacteria. Works naturally within the soil to help plants establish fast, withstand environmental stress, promote deeper roots, and better blooms, and improve soil structure. 100% natural and organic approved plant foods. The Tone products are made for complex blends of the finest natural and organic ingredients. No sludges or fillers are ever used. They are enhanced with Bio Tone beneficial microbes to help