Newmarket, Ontario (Head Office)
1175 Stellar Drive, Unit #5
Newmarket, ON L3Y 7B8
- Mon10:00am–6:00pm
- Tue10:00am–6:00pm
- Wed10:00am–6:00pm
- Thu10:00am–6:00pm
- Fri10:00am–6:00pm
- Sat10:00am–4:00pm
- SunClosed
$0.00 CAD
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PRO-MIX Vermiculite is a vermiculite soil amendment for seed germination and rooting cuttings, designed to improve aeration and water-holding capacity in soils and potting mixes. It’s also a soil and potting mix conditioner that supports steadier moisture management and more efficient nutrient availability.
This product is well suited as seed cover during germination because it helps maintain proper moisture where seeds need it most. That moisture-holding support can decrease watering requirements, which is especially helpful when you’re aiming for more consistent germination conditions without the swings that come from a mix that dries too quickly.
PRO-MIX Vermiculite is designed to improve aeration in potting mixes while also improving water-holding capacity, creating a more balanced root-zone environment for early development. An airier structure supports healthy root growth, and the added water-holding capacity helps keep moisture available longer between waterings. For growers and gardeners who want a simple way to improve how a potting mix behaves, these physical properties are a clear, practical advantage.
Nutrient performance is another key benefit. PRO-MIX Vermiculite improves nutrient holding and exchange properties of soil and potting mixes, which supports better use of fertilizer by plants. In plain terms, it’s designed to help the root zone hold onto nutrients more effectively so plants can access what’s available more consistently as they establish and grow.
Because it’s a single-ingredient vermiculite amendment, it’s easy to classify and easy to fit into a wide range of growing styles where seed cover, seed germination, and rooting cuttings are part of the routine. The focus stays on core performance: improved aeration, improved water-holding capacity, improved nutrient holding, and improved nutrient exchange in the root zone.
PRO-MIX Vermiculite is a good fit for growers who want a straightforward vermiculite soil amendment to support seed cover during germination, reduce watering requirements, and help plants make better use of fertilizer through improved nutrient holding and exchange properties.

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