Cotton burr compost
 

Lost most of my tomatoes to poor draining soil this year so am building raised beds for next spring . Purchased bulk garden soil . I am planning on working cotton burr compost into the top few inches of the beds . I am purchasing at local nursery in 2 cu. ft. bags . Pretty dry stuff . My question is : Do you think it would be best to add the compost now and let it age till spring or wait until spring to add to the soil to keep it more nutrient . Thanks for your advice .

You aren't going to have much nutrients in cotton burr compost if any nitrogen at all.
This type of hot compost is more of a soil builder not a fertilizer

You can go to a feed store and get cotton seed meal and it will not only add nitrogen but help acidify the soil too.
Not the expensive garden stuff but cheap cow feed.