Vermiculite can be used alone or in a potting mix for improved seed germination. Utilizing vermiculite for this purpose will see seedlings develop more quickly. If used alone, add only a small amount of water so as not to overwhelm the seeds.
The vermiculite will release the moisture to the seedlings as and when they need it. You should also add a few drops of weak fertilizer once leaves appear on the seedlings, to substitute nutrients which would ordinarily be supplied by the soil. When the seedlings are ready to be planted outside, they can easily be removed from the vermiculite without damage to the roots and potted on.
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