John: I have used Welsh Poppy ( meconopsis cambrica " Frances Perry") to cover a large area of bulbs to include lycoris, tulips and some dwarf narcissus. It doesn't seem to interfere with any early spring growth of these bulbs and the spikes of lycoris flowers punch right through without a problem. My question to the group is what to use with the early summer growing foliage of colchicum's once the foliage dies back leaving the bar ground that John references. Arnold > > >