Hay Storage Floor

Reading another topic I thought I would make a new one and describe my situation. Using neighbors hay shed to store my hay and it has a dirt floor, looks like it had some gravel years ago. I stack my squares on wooden pallets but my rounds I stack on the ground. Last spring I cleaned the shed out real good and stacked hay in it. On the bottom rounds I have had some moisture come up in the bottom. Rest of the hay looks fine it just the bottoms look bad to me and the customers. This year it looks like fertilizer or gravel but not both so if I can’t afford to build up a gravel base should I leave the loose hay there to stack the rounds on?

Hay Storage Floor