Vermiculite has a larger pore size than perlite. This means that there is more space for air to flow through vermiculite, which helps to improve drainage and aeration.
Vermiculite is more porous than perlite. This means that it has more tiny air pockets, which also helps to improve drainage and aeration.
Vermiculite retains water better than perlite. This means that it can help to keep your plants' roots moist without drowning them.
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