No. Plant up to just below the Cotyledons. As long as they're green they're functioning. If you bury them they can start rot since they are not able to produce roots and will just decompose in the ground.

Have to disagree here Flora, particularly with tomatoes. When true leaves start to develop, the job of the cotyledons is done - simply take them off (they often diminish and die anyway) and bury the plant right up to the start of true leaves.

I have to disagree with Campanula here ;-) If the cotyledons are green they're still photosynthesising, even if there are true leaves. If you take them off and bury the stem that's fine but the OP asked if she could bury the cotyledons. I still say don't.

For me it all depends on how leggy the plant is, how thin or weak the stem is.

If it is tall and quite leggy then IMO it will benefit more from planting deep and sacrificing the cotyledons and maybe even some of the lower leaves to get most all that weak stem under ground. If it is a short, stocky, well developed transplant then it can be buried just up to the cotyledons.

In other words, no one approach works with all plants.

Dave

I sometimes bury, sometimes not. I don't pay much attention to the cotyledons. Never an issue. Go with what feels right.