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Can be plumbed for permanent drainage
Spot issues like pests or nutrient deficiencies
and other amendments
35% - Potassium (K)
Repeat treatment every one to two weeks as needed
Hydrofarm Black & White Grow Bag- 3 Gallon (Case of 20 Packs) Hand Cleaner Can be plumbed for permanentWhite Black Grow Bags This update to our classic Hydrofarm grow bags features a new durable white plastic outer layer so you can write details like plant type, planting dates and growing notes, right on the bag! The white surface also reflects light, helping keep plants' roots cooler. These bags are a great low cost alternative to plastic pots used by greenhouse growers. And as always, they're made from a specially formulated plastic that provides for