The best way to amend soil in an existing garden is by top-dressing the bed with an inch or two of compost each season. The compost will break down, improving soil structure and fertility. Plus, you’ll perk up your perennials.
Add home-made garden compost, bagged compost or well-rotted manure. As a rule, add a minimum 5cm layer of organic matter over the surface before digging or forking it in. These organic fertilisers are more beneficial to soil bacteria than inorganic compounds.
Adding Organic Matter: In the spring, if all you do remember is to add organic matter such as compost, that will get you off to a good start! Add on a day when the soil is moist but not wet. Spread a minimum of 2 to 3 inches of compost or aged manure onto your soil (and no more than four inches).
Adding organic matter in the form of compost and aged manure, or using mulch or growing cover crops (green manures), is the best way to prepare soil for planting. Adding chemical fertilizers will replenish only certain nutrients and do nothing for maintaining good, friable soil.
Organic matter helps sandy soils retain moisture and nutrients, and it helps loosen clay soils, making them less tough and dense. If you’re planting shrubs in your raised beds, you can even add some shredded pine bark mulch to your garden soil.
Compost can be made from garden waste, grass cuttings, shredded newspaper and kitchen waste. Leaf mould also makes an excellent soil improver and makes good use of leaves cleared from the lawn, however nutrient levels are quite low.
Loosen the old dirt in the raised bed, using a shovel or a spading fork. Break up large clumps of soil and remove dead plants and roots. Add 2 to 4 inches of compost and mix it thoroughly with the old soil. A soil test kit can help you determine the pH level and other nutrients needed for your plants.
It is recommended to add sand if the soil is heavy in texture. This will improve soil texture and it will be beneficial for garden plants. However, one must be careful about the quantity of sand to be added. If the soil becomes too light in texture, it willnot retain irrigation water and added nutrients.
Fall is the best time for lifting perennials out of their garden to add soil, though it can be done in spring if necessary. Work quickly to add the desired amount of soil before the plants’ roots dry.
Testing soil — especially new garden soil — helps guarantee your vegetables and other plants will do their best during the growing season. And springtime, just before you begin planting, is the best time to do it. Home kits are not only effective but make soil testing easy.
Amending your garden soil with high quality organic matter in the early Spring is the best way to get your vegetable garden started off on the right foot. You can also amend the garden soil with cow, horse, donkey, or goat manures (make sure the manure comes from a herbivore, not carnivores).
How much soil amendments do you need. You will usually add about 1 to 4 inches of soil amendment to your garden.
Organic soil additives are used to improve the physical properties of the soil, such as fertility, water retention, drainage permeability, aeration and soil structure. Better soil properties allow the roots to penetrate the soil and obtain the needed air and moisture.
Organic materials such as compost, peat moss and manure help open up air passages into the soil, and earthworm activity helps keep it loose. Mulch on the top helps also. What makes peat moss ideal right now is that it’s as dry as talcum; compost and manure aren’t.
The best time of day to use most fertilizers is in the evening, when the sun is waning, and after watering or a rain. Chemical fertilizers can wash through without leaving much benefit in the soil if they are watered after application and they can “bake” in the sun and either lose potency or burn the plants as well.
Organic matter is the best way to amend clay soil: It lightens the soil texture, discourages compaction, adds nutrients, improves drainage and aeration, moderates soil temperature, and provides pore space, which is essential to plant growth.
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