If the space available to them is too scant, they will need further transplanting too soon. Plant individually in pots, a coarse, porous mix is best, water sparingly at first to encourage the development of new roots, place in a spot with really good light but no direct sunshine, then move to sun for part of the day. Plant with 1 cm. or so of mix over the bulb at first, subsequent potting on will require deeper planting as this encourages maturity.