In case Jagdad doesn't check back today, my general gardening experience would say no, don't use fresh manure or leaves for the new plants. Those components need to be composted first where they are broken down into components the plants can actually use. Put them in a pile that you turn periodically and use in Spring. If your soil is not good, I would get some bags of regular potting soil to mix in or use for your plants. Fresh manure will probably burn these young plants and uncomposted leaves don't add anything to the soil until they break down. Sand is just a filler to give some texture to the soil, but I would guess you have plenty of sand in the soil in your area. I grew up in Newport and the soil was very sandy with no nutrients. We planted everything in potting soil.