Rapid germinatiion of marigold seeds

Dunno whats going on this year but my seeds are germinating really quickly in the conservatory,where I always do them.  I planted some marigold seeds on Thursday evening and bu Saturday morning they were poping up.  Never come up that quick before.  The peppers were quick as wellfour or five days and asters withing 3 days.

My mariolds have germinated in a few days. I thought they would turn out to be weeds as they came up so quickly but maybe not

im just about to do  mine. how long generally before they are large enough to plant after coming thru?
i'm putting mine in hanging baskets.