Use coco mate. The compressed bales you get are a favourite for GGers. They fit in a bag easy, no water to carry to site if you drop them a few weeks early. No ph problem ether. Just big it into the native soil you can even use your old spent coco from your indoor grows. A small hand full of Fish blood and bone and a large hand full of coco. Dig it into your native soil and that's it your good to plant your sprouted seed or pre started seedlings, cuttings. It really is that simple. Finding good safe site's is the hardest part. The thing to remember is every site is different. For example this site i have the Polar haze in is full of stones and because of that I need extra compost or coco. For the seedlings to get established. I have another site not to far from this one that hardly as any stone's and good soil. I dont even add compost or coco just a little feed to this site. If the soil was bogged I would grow in full or half bags of compost or soil with the top and bottom cut off. Every year you grow in a site your learn to adapt a little better to it. If your growing around 55lat UK I would recommend a calcium feed pre flower or even early flower. Mares tail tea is a good organic feed for this purpose.