Hi Paulotti

Mine have only just started shooting, all three about an inch high. All I did with mine (last years corms) was pot up with fresh compost and water when compost had nearly dried out. Mine had the benefit of being on the bottom shelf in the green house so they got the slops from the top shelf
They are ok. If your worried move them into the light and warmth of a top shelf and keep the corms moist. Worked for me.