Dendrobium Seedlings Need Your Help

[Cntry]

My List of my Dendrobiums
Kingianum
Burana Jade x Emaron Gold
Genting Red
New Burana
Woo Lung ' Blue Lip'
Marcophyllum Sulawesi shiraishii ' Spot'
'Tangerinum'
'Touch of Peach'
'Two Tone Zane'
'Everlasting Love'
'New Hope Mini'
Spring Dream 'Apollon' (I know this is a nobile)
Sea Mary' Snow King' (I know this is a nobile)
Formosum Vargiganteum
Yellow with Pink Lip
Jacquelyn Thomas 'Uniwai Supreme'

My question is how long do I treat them as seedlings and do not give them a winter rests on the ones that will need it? Which ever ones they are. At this point I know the two nobiles I mentioned will need the winters rest as they become larger.
If you can give me any care instructions please do. Thanks You