I have this plant in my garden and it does spread but it's very easy to remove. You could dig up the extra bulbs and transplant them or discard them. In the spring you can see where it's coming up as it looks like clumps of grass before it blooms. Since it's a spring blooming bulb plant it dies back to the ground after it finishes blooming. I tuck the new bulbs it makes along the edge of my blue-stone path. They look so pretty in spring and by summer they disappear. BTW - the bulbs are quite small (about the size of a crocus bulb) so they can't damage other plants when they spread.
I have this plant in my garden and it does spread but it's very easy to remove. You could dig up the extra bulbs and transplant them or discard them. In the spring you can see where it's coming up as it looks like clumps of grass before it blooms. Since it's a spring blooming bulb plant it dies back to the ground after it finishes blooming. I tuck the new bulbs it makes along the edge of my blue-stone path. They look so pretty in spring and by summer they disappear. BTW - the bulbs are quite small (about the size of a crocus bulb) so they can't damage other plants when they spread.