gardeningwithe, The parsnips don't germinate well in warm weather. Try planting some now. (They usually take 3 weeks to germinate.)
I don't know how well they will do in your climate. Anyone near grow them that you know of? Can't hurt anything to try it.
Parsnips are usually grown full season and harvested after the first frost. Seems the cold makes them sweeter. My Father used to leave them in the ground and harvest in the spring, about a full year from planting them. They do winter over, and if let to grow the second year will bloom and make seed so you can collect your own seed.
Though I just planted some seed, I think I will wait a month and plant another row just for the test to see how each planting does.
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-