Most fruit, vegetables and herbs will benefit from an application of fertilizer feed at the beginning of the growing season, usually in late spring. Throughout the growing season look out for plants showing signs of a particular nutrient. With fruit trees, wait until they reach flowering age before feeding and take care not to overfeed or you will promote leaf growth at the expense of fruit yields.
In order to discover where you can apply fertilizer to the soil around a fruit tree, measure from the trunk to the full reach of the branches. Then draw a circle round the tree to this dimension. The roots of the tree will be within this circle, which means this is exactly where your fertilizer ought to be applied.
Watering plants is a fairly simple process. Most plants have the tendency to survive in extreme situations with either too little or too much water for a few days. The amount of water your plants require depends upon weather and soil conditions, as well as the health of the individual plant. Young plants and the seedlings need frequent light watering. Try to ensure that they get a good soak every few days - once plants are mature, frequent light watering simply encourages their roots to stay near the surface rather than growing deep down into the ground.
Leafy salad crops will need extra water in dry periods to prevent them from running to seed, while the fruiting vegetables need more attention