Rockwool cubes for seed starting with stakes

$22.99

Data updated 2026-10-30

These 1.5 inch rockwool cubes are a standard medium for starting seeds in both hydroponic and aeroponic systems. Made from spun basalt fibers, they provide an excellent ratio of water retention to aeration. This pack includes 98 individual plugs, offering a large supply for multiple planting cycles or large-scale tray setups.

The material is inert and sterile, which helps prevent soil-borne diseases from affecting young plants. These cubes are designed to fit into standard propagation trays and can be easily moved into larger hydroponic systems once the roots have established. The structure of the rockwool supports the root system while allowing it to breathe.

Included with the cubes are plastic stakes for labeling or supporting young plants as they grow. This combination is a staple for growers who prefer a reliable, professional-grade medium for germination. The cubes are easy to soak and maintain their shape even when fully saturated with a nutrient solution.

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