Help, please! I have to knuckle down and renovate all my garden beds and borders, a huge job as they are densely planted with small trees, shrubs, perennials, bulbs, groundcovers, etc. and infested with some hard to get rid of grass. I will have to do one border at a time. I don't mind the hard work but I would like to do it right the first time as I am not getting any younger. Did I also mention I have several mature trees that contribute to the mass of roots in the beds. In a perfect world, what would be the best practice? I will have then have to tailor that to what I can afford and lay my hands on. I have 4 50 lb bags of Turface, 1 bale of peat, 10 pkgs of compressed coir, lots of chopped leaves (all those trees), a bag of alfalfa pellets (nitrogen), 1/2 a cubic yard of shredded bark and can get more, some compost at various stages of decomposition and sadly loaded with seeds, access to strawy horse manure (piled in a corner of a paddock, partially aged, months, but added to daily), and some used potting soil. I can get more of any of these ingredients. I do not have a source of bulk topsoil or municipal compost. I also have a big of greensand and a bag of granulated phosphate rock. The summers here are hot and dry and there are water restrictions. My soil is neutral to slightly acid and the subsoil is fairly close to the surface,2 to 4 inches. There is no standing water. I have a huge biodiversity of plants (aside from a lot of snow crocuses and lilies in pots) and no diseases or problems as I tend to grow mostly what does well in my conditions. The beds usually take care of themselves for the most part and have something blooming from March to November. When I started making my beds 30 years ago I dug down into the subsoil, mixed in a layer of horse manure and covered that with wet newspaper and mixed peat and what compost, etc. I had into the rest of the soil and put it on top. That worked quite well but because digging the bed in the first place was such hard work I enlarged them a few inches from year to year. I have added leaves and bagged manure to the top over the years. I read that the organic matter is most useful to plants in the top 6 inches of the soil. There is a lot of conflicting info out there. There is no way I can attempt double digging to a depth of 12 to 18 inches. Digging down 8 to 10 is a hard won triumph though I can raise the level of the bed. Should I put Turface (water retention) mixed in under the replanted shrubs like hydrangea or mix it into the top 6 inches? I would be grateful for your suggestions. Thank you.