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[PRIMROSES] Starting seeds

I recently joined the American Primrose Society and
receved their Welcome letter and some Primula veris seeds.

Generally I start seeds in 2 inch pots covered with
clear plastic using a mixture of equal parts of peat
moss, perlite and vermiculite with a small amount of
lime where needed and the whole thing moistened with
a 20-20-20 fertilizer solution.  I spray the seeds
lightly when I start them.

I try to put 1 seed per pot because this simplifies
transplanting and allows me to control growing conditions
for each plant.  This seems to meet almost all the growing
conditions outlined in the growing instructions.

My question concerns the growing conditions in the
instructions:

     "Set the containers outside or in a cold frame
      so that the seed is exposed to temperature
      extremes."

How important is this?

The outside temperature here in New Jersey in Nov./Dec.
varies between 20F to 50F.  I have a heated "alpine"
house that I keep about 50F and a light garden that
stays between 65F to 70F.

Can I leave the seeds in the light garden or would
it be better to cycle the seeds temperature extremes
until they germinate?

I've never grown Primulas from seeds and the only
primulas I have grown are P. japonicas so I have
a lot to learn.

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