If your bulbs are planted under deciduous trees, where they get spring sun, before the trees leaf out to create shade, then you may want to consider using ferns as a way to hide the yellow stuff.
(your bulbs; are planted; under deciduous trees) (they; get; spring sun; T:before the trees leaf out to create shade) (the trees; leaf out; to create shade) (the trees; to create; shade)
your bulbs they the trees the trees
are planted get leaf out to create
under deciduous trees
spring sun T:before the trees leaf out to create shade
to create shade
shade