Hi gardenerzone4,

Welcome to The Bulb Forum.

In checking, I see that Marieke is a Division One Trumpet (Long Cupped) daffodil that is hardy in your zone. Since bulbs are typically planted at a depth of 2-3 times the height of the bulb, and considering your zone, I think you planted them 'just right'. I would not really count pine needles and crushed leaves as additionl depth, since they are so much lighter than soil, particularly heavier clay soil.

I'd say so long as the soil drains fairly well, and if the newly planted bulbs got sufficient moisture to develop roots before the ground froze, that Marieke will put on a very nice show for you later this spring. Since the tips have emerged, that is a very good sign they will be fine. I think they may be a bit later than mid season, since the mulch will prevent the soil warming up in the sun.

Sue

Here is a link that might be useful: Marieke at Daffseek