I have a soil plant farm close to the surface growing all types of plants (except for Deathweed, because I don't want to deal with corruption). All the plants are maturing and blooming fine except for Fireblossoms - all Fireblossoms I've planted so far have failed to grow past the sprout stage. What could cause them to fail to grow?
Note that I'm not talking about blooming, which I know requires lava in the case of Fireblossoms, but the plant maturing to the point where it is able to bloom.