when is the time to plant pumpkin seeds if you would like to have pumpkins by next halloween?

On average, approximately 90 - 95 days beforehand. If you live too far north to avoid frost at that time, you can plant in peat-pots indoors then plant directly into the ground. Remember this is an average. Local conditions, and oddball seasonal variations could lengthen the time. Since pumpkins keep well, planting a little earlier is a better bet.

I always thought that pumpkins were 110 days...what I would do is...plant a few around May 15th, then a few May 30th and a few June 15th...that way you will be sure to have some when you want them...and be sure to soak them in water overnight first...

this comming summer maybe at the end of may