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Amacok's starter plugs are 1-inch rockwool cubes with a pre-formed planting hole, sold in a 50-plug sheet for hydroponics, seed starting and cloning. Rockwool holds water while keeping air around the roots, so seedlings and cuttings root fast and transplant cleanly into net pots or soil. The cubes stay intact after soaking and can be cut to size. The catch is pH: fresh rockwool runs around 7-8, so it needs soaking in water adjusted to about 5.5-6 before use. Compared with peat or coco plugs, rockwool is more consistent and reusable in systems, but it is not compostable and needs gloves when handled.
In stockSold by ViwoeimReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
These rockwool starter plugs are made for starting seeds and rooting cuttings without soil. The set comes as 1 sheet with 50 plugs. Each plug has a planting hole.
The plugs are made from rock that is melted at high temperature and spun into fibers. The fibers are then compressed into soft, uniform cubes. The material is sterile, light and porous. It absorbs water well, drains well and holds air for the roots. The cubes can be cut into different sizes and do not separate after soaking.
New rockwool has a high pH, generally 7-8. Before use, soak the plugs in water adjusted to a pH of 5.5-6, or add a little acid such as lemon juice to lower the pH. Wear gloves when handling them. To plant, soak the plugs in water for 2 minutes, then let them stand for about 15 minutes. Place the seeds or cuttings in the holes and set the plugs in a seed tray. Once rooted, the plugs can be transplanted whole into net pots, soil or a planting machine. They suit hydroponics, seed starting, rooting, propagation and cloning systems.
