It doesn't have to be given to your succulent fertilizer. However, it will help it grow. If you give it to your plant early enough, it will simply "forget all about it" and return to growing. When the succulent is healthy you'll see offsets.
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Keep following us to receive daily, inspiring succulent content. The word succulent means a plant possessing thick, fleshy stems and leaves primarily as an adaptation to store water.
They do not like to be sitting in soggy soil, so a glass jar or terrarium, which does not have anywhere for water to drain out, is not going to make your succulent happy.
Although you don't need to fertilize your succulent, it will make it more resilient. If you give it to your plant early enough, it will simply "forget all about it" and return to growing.