Soil Preparation and Basic Fertilizing

If you want to grow vegetables in ground or in containers, it is important to know that your harvest will be more productive if you have organic matter in your soil. Organic matter is mostly broken-down, old, dead plant material. You might have heard other gardeners talk about compost. Well, compost is a very good source of organic matter for your garden. Compost has lots of nutrients in it that those once living plants absorbed from the soil, themselves, when they were alive. Once compost breaks down it releases these materials back into the soil. These materials can then be reused by your garden plants and will be brought in through their roots along with the water they absorb. Compost also supports the right types of bacteria in the soil. Gardening specialists are learning more about the importance of bacteria and their work of breaking down materials and releasing useable nutrients back into the soil. Fresh plant material is not good either – as the bacteria use up some of the needed nutrients that your garden plants want to break down these old, rotting plant materials. Always make sure to use well-rotted compost to condition your garden soil.

Some gardeners mix a bit of fertilizer into the soil as they plant their seeds. This is fine if done so sparingly – but it is better to fertilize your plants once they are established. It is very important that you don’t over fertilize your plants.

Nitrogen, phosphorous and potassium (N, P, and K) are the main nutrients that are needed in larger amounts by most plants, but some micronutrients might need to be provided. Micronutrients include boron, zinc, manganese, and sulfur, to name a few.

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Reminders about fertilizing your plants.

  • Don’t assume that fertilizer is needed – but know that it might be needed. Test your soil.
  • Misapplying fertilizer (adding too much) may cause plant death. Read and follow the directions.
  • Don’t fertilize young plants before they get established – wait until they are established and have a few good leaves on them.
  • Vegetables should get regular fertilizing throughout their growth. Add a bit extra as they put on fruit or mature before harvest.

Resources in this section (Soil Preparation and Basic Fertilizing):

  • The LSU AgCenter’s article by Dr. Heather Kirk-Ballard: “Timing is Everything with Fertilizer” This article helps a gardener understand the practical issues of fertilizing your plants and what types of plants prefer more fertilizing compared to others.
  • The LSU AgCenter’s article by Dr. Heather Kirk-Ballard, “Can you Reuse Your Potting Soil? This article informs a gardener how to sterilize your potting media and indicates whether potting soil should be reused.
  • The LSU AgCenter’s article by Dr. Heather Kirk-Ballard “Invest in Your Soil” teaches gardeners how to invest in your soil for future planting success.
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