My pumpkin vines are taking off and growing out of the raised bed. I was expecting that. I'm OK with it growing on the lawn -- I was going to mow one more time then let the pumpkin grow, but it occurred to me that it might be better if I got some straw and layered flakes of straw over the grass (maybe with paper sheet mulch underneath) for the pumpkin vine to grow over. I'm planning to convert this area to another raised bed anyway so it's perfectly fine to let the grass die. There IS a patch of clover that I might want to save but it's not a big deal.
Is it better for the pumpkin vines to grow on living grass (but the grass would grow tall between the leaves and possibly shade them?) or on straw mulch?