Silkworms only eat mulberry leaves or our special mulberry prepared silkworm food.
Perhaps you'd like to save money in the long run and plant a mulberry tree so you'll
have plenty of free food for your silkworms. That would be awesome. It does take
a couple of years for the mulberry tree to become large enough, however.
Mulberry Seeds
White Mulberry (Morus Alba)
Start your own mulberry tree and have lots of leaves to feed your silkworm buddies.