Liming the garden is process used to raise pH level of the soil. Many soils are too acid to grow plants. Even after using hydroponic fertilizer, you will not get desired results if pH of you soil is blow 6.5.
How to do it:
Liming should not be done while the plants are growing as it may hurt the plants. Ideally at the beginning of a garden season, soil should be tested and then if the need arises, liming should be done. It is ideal to wait two three months after liming the garden as soil and pH levels will need some time to get adjusted.
Hydroponic fertilizers are acidic in nature and lime is alkaline. It is well known fact that acid and alkali do not gel well together. So it is advisable to keep a difference of two to three weeks between application of lime and fertilizers in the soil.
Lime is to be sprinkled over the soil surface and the top couple of inches should be mixed thoroughly with it. It is not necessary to manually apply the lime down in the soil; because it will automatically leach towards the root area into the soil very much like hydroponic fertilizers. Usually liming a garden once in a couple of years is sufficient, however you can determine by doing annual soil-testing as well.
Liming your garden soil reduces acid levels of soil. This helps in decreasing soil erosion. Organic hydroponic nutrients get easily incorporated with neutral soil. Liming your garden will help you prevent your soil from becoming barren.
So get your garden limed and see it flourish with great plants over the years.