How to Fertilize With Sugar

Written by soumy ana
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How to Fertilize With Sugar
Water-sugar fertiliser gives the beneficial microbes a boost. (Brand X Pictures/Brand X Pictures/Getty Images)

Chemical fertilisers can damage the roots of a plant if not used properly, which is why natural methods can help. You can use sugar fertiliser to give weaker plants or growing plants a boost. Sugar fertilisers come in different forms: white refined sugar, molasses or honey. Plants use photosynthesis to produce sugars that they will nourish from. Thus, it makes a lot of sense to fertilise your plants with a sugar form, may it be from honey, molasses, sugar or carbohydrates.

Skill level:


  1. 1

    Put 1 teaspoon of honey in 3 quarts of water and water plants every two weeks. Use honey regularly because it contains a natural antibiotic that prevents fungus invasion.

  2. 2

    Mix 2 teaspoons of refined white sugar per gallon of water. Water your plants with this solution once a month. Do not use too much sugar. Sugar facilitates the growth of fungus and attracts insects, especially ants.

  3. 3

    Spray dry molasses directly over your plants. If you want to fertilise a large area like your lawn, use 0.907 Kilogram per 100 square feet. Spray the molasses when the soil is dry and there is no chance it will rain the same week. Dilute 29.6ml of molasses with 1 gallon water and spray your plants. To spray a larger area, mix 2 quarts of molasses per acre. One quart is equal to 907gr, so dilute 2 quarts in 64 gallons for 1 acre of land. Molasses does not attract insects. It is made from sugar cane instead of refined sugar. According to Bright Hub, molasses repels fire ants, so it will not attract pests.

Tips and warnings

  • Use rice water instead of sugar on a regular basis because rice water contains all the excess sugars and carbohydrates your plants need from rinsing the rice.
  • Water sugar helps kill weeds in your lawn. Weeds have deep roots while grasses have short roots. Sugar stimulates the grass while depriving the weeds of nutrients by reducing the nitrate level of the soil. "When sugar is spread on the soil, it feeds soil micro-organisms, which then absorb lots of soil nutrients as they grow," explains Dr Ian Lunt. "The micro-organisms then hold these nutrients so the weeds can't gobble them up. In effect we are 'starving' the weed species that require lots of nutrients to grow."
  • Sugar stimulates rapid foliage growth but does not stimulate roots. Use B1 solution with the water sugar fertiliser to stimulate the roots.
  • Keep your sugar solution low if you want your plants to thrive. Too much sugar produces the opposite. Sugar does not fertilise. Sugar nourishes the beneficial microbes that in turn enrich the soil. When the microbes multiply too fast, they deplete the soil from nutrients.
  • Check the plants regularly for fungus because fungus typically feed on sugars.
  • Choose high quality dry molasses with at least 42 per cent sugar in it. Use darker, organic, richer in nutrients liquid molasses.

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