Here's an interesting article from Deseret News on fall crops. That's not now, of course, but you can plan...

Also an article on root crops from West Virginia University extension services... Rediscover Forgotten Root Crops - http://www.wvu.edu/~exten/infores/pubs/fypubs/Rediscover%20Forgotten%20Root%20Crops%20Leader's%20Guide%20WLG%20151.pdf

Here is a link that might be useful: July - good time to plant for fall harvest

You can plant peas, lettuce, cabbage, or other "cold-season" veggies in early March. I always grow peas, and it's great, because it's the only time my kids will eat them!

Last year, I planted green beans in July after the peas were all gone, in the spot where the peas were. It worked OK, but they would have done better if I planted them early. I didn't harvest them until early October, and I think I would have had a better crop if I would have planted them by the first of July for a September crop. Of course, beans can be grown from spring planting for summer harvest too.

Thanks for the info so far guys. Those are helpful links, and the information about early march is good.

I guess that, in reality, I should ask what a good comprehensive book for this kind of thing is. My Dad knows a lot about crops in Utah (he works in agri-business) but he's so long-winded that its painful getting a straight answer from him sometimes. Is there a book on Utah gardening that is useful? I checked a couple at the bookstore but didn't see much specific to vegetables and multiple plantings in a year. I don't even know the timeframes....i.e. plant peas in early march and then harvest them when? And then plant summer crops when and expect a harvest when?

Those types of basic questions are too much for this forum, so some sort of reference work would be excellent.

Thanks.

Most seed packets will tell you the days to harvest. I got some red onions that I will plant in March and expect to harvest 100 days from then. Kale in April and expect to harvest 60 days from then. Pumpkins will have to wait until June, but their 120 days to harvest will take me right up to September/October for Halloween.

Month-by-Month Gardening in the Rocky Mountains: What to Do Each Month to Have a Beautiful Garden All Year by John Cretti
has a section about vegetables and when to sow seeds indoors, when to sow outdoors, and when to plant out.
I got my book at Lowe's or Home Depot. There are quite a few books there, that you can browse through.

Surprised no one mentioned Elito Colemans Four Season Harvest. My first fall/winter w/his method has been surprisingly productive.

The best thing to plant in fall is garlic. I have put in with some success spinach, kale, lettuce, and arugula. Also in fall put in carrots and onions for next spring.

The Utah State Extension service is a great resource for anything Utah in terms of growing vegetables.

Here is a link that you may find helpful for harvest dates, planting times etc.

http://www.co.utah.ut.us/Dept/Exten/Data/vegetableutah.pdf

A general rule of thumb is that you have three different types of crops. Cole crops (they like cool weather and frequent water), summer crops, and hot crops.

Cole crops- Peas, onions, lettuce, carrots, radishes, broccoli, cauliflower etc. Generally, these can be planted once the soil can be worked and can withstand mild freezing temperatures.

Summer crops- cucumbers, summer squash, beans, peppers etc. These must be planted after the danger of frost has past and you usually can't get more than one harvest per year.

Hot crops (vine crops)- Melons, tomatoes etc. These like it hot and like deep but infrequent watering. These will die with one frost.

Cole crops are the ones that you will try and do in the spring and again in the fall. You will start planting your fall crop July 1st depending on the plant.

I hope I didn't overwhelm you, have fun with it and don't get discouraged.