Posted: 11/03/2015 at 15:48
Did you use demineralised water? Tap water may make the results more alkaline.
Having said that, alkaline is great as long as you don't try to grow ericaceous plants like camellias, azaleas, rhodos and some others. My garden is fertile alkaline loam on a clay subsoil - great for clematis, honeysuckles, roses, all sorts of shrubs, tres, perennials and bulbs and also good for veggies. Brassicas like alkaline soil as it helps fight club root.
Adding fertiliser is always going to help but it's best applied as a mulch of garden or municipal compost in autumn to condition the soil and then well rotted cow, horse or sheep manure in late winter so the goodness doesn't get leached out by all the winter rains. You can also scatter pelleted chicken manure or blood, fish and bone if foxes aren't a problem. You can make a liquid feed from nettles to give a nitrogen boost to leafy plants and a comfrey feed for plants which will flower or produce fruits.