Ramblings about Very acid soils
The acidity of your soil is IMPORTANT and should be known and understood. Soils in our area vary from very acid to reasonably alkaline. Soil acidity is measured in terms of pH, a measure of free hydrogen. Very acid soil has a pH value of 4-5. Neutral soil is pH7and anything higher than that is alkaline. Most soils are in the range of pH 5-9 and the majority of garden plants are reasonably happy. Lower or higher Ph values will bind some neutrients making them unavailable to plants.
Different types of plants have different neutrient requirements, so will only live in certain bands of pH. Most plants fail in a pH of lower than 5, although specialised plant families sometimes demand these conditions [mainly bog plants]. Plants of the Ericaceae {Heathers, Rhododendrons and Pieris] almost always demand acid conditions, some very acid. Most of the Rosaceae need alkalinity [a pH of over 7]. These include Roses and fruit trees.
My first advice to you is to buy an acidity test kit [a pH testing kit] fro a garden supplier or sometimes a pharmacist and to test the soil in several parts of your garden. Soil can often have a high pH around demolished buildings which used lime mortar. The wild flora of an area can often drop broad hints about soil acidity, but thats another subject [see Further reading]. Soil pH can then be raised by applications of lime or lowered with 'flowers of sulphur'. But its usually best just to recognise the limitations of your soil and to work with it. The exception may be bog derived peaty soils which are sometimes so acid that they only grow bog flora and blueberries.
If you are lucky your soil may be nearly neutral and only require discrete amounts of additive applied locally to adjust the conditions for individual plants.