My sweetcorn has finished and I lifted the plants yesterday, chopped them up and they are on the compost heap now, my onion sets have arrived and I'm going to plant them where the sweetcorn was but I'm unsure whether to dig in some fresh compost and wait or will the onions be ok just to put straight in, if I wait then it will be a week before I can get the sets in and I'm worried about keeping them this long without planting them. any advice welcome