Potato Starch – Great source of Nourishment for Plants

Indoor plants need nourishment, particularly in the dead of winter when sunlight is lower than other times of the year. Plants love starch and potato starch is a good way to give it to them.  To add starch in a “green way”, save the water you boil your potatoes in.   Starchy water will spur the release of plant nutrients in the soil so it makes a great addition.

Potato Starch

Note: Don’t use salted potato water as this can harm plants.  Use unsalted potato water, let it cool for a while, and then use it to water your household plants.  This works because starchy water spurs the release of nutrients in the soil. Recycled pasta water also works in a similar way.

Recycle your boiled potato water and use the potato starch on your plants.

Don’t substitute potato water for plant food.  Just use the potato water in addition to any plant food you may use. If you save any potato water to use over a period of days be sure to shake it to stir up the nutrients before giving it to your plants. Just add it to your watering can and water as you normally do.  Fertilize on another day.Add starchy potato water to a watering can

The water from boiled potatoes can be used on both outdoor and indoor plants.

Potato water (and other vegetable water) is also great to use on the compost pile.  And don’t forget to add the potato skins there too!

Plants are not the only thing that likes starchy potato water.  You can use it around the house too.

Other uses for potato water.Boiled water from potatoes

  • Use it as a base for gravy (you won’t need to add as many thickeners!)
  • Add it to bread mixes to add texture and a bit of extra flavor.
  • Pour it over dry dog food. They will LOVE it!

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  7 comments for “Potato Starch – Great source of Nourishment for Plants

  1. admin
    09/15/2013 at 7:40 pm

    Thanks Hollister.

    Just a basic word press theme that I have customized to suit my needs.


  2. Isabel J Wee
    02/05/2017 at 11:48 am

    Thank you, I am giving the indoor aloe a little of the potato water & would like reassurance that they will be alright.

    • Carol
      02/05/2017 at 2:00 pm

      Hi Isabel. You should be fine as long as the water is not salted. Carol

  3. Carol
    05/18/2020 at 12:51 pm

    What is the difference from table salt and ebson salt? I read an artical that said ebson salt was good for plants?

    • Carol Speake
      05/18/2020 at 12:56 pm

      Table salt is made up of the elements sodium and chlorine. Epsom salt, on the other hand, is made from a naturally occurring magnesium sulfate mineral called epsomite, which contains the chemical components magnesium. It is though to have benefits to plants when used correctly.

  4. Bevanne
    05/25/2020 at 9:57 pm

    I told my husband about putting my potato water on the plants he said he didn’t think it was a good idea he said only put on one I don’t want to lose all the vegetables

    • Carol Speake
      05/27/2020 at 6:17 pm

      The main thing that you need to be careful with on the water is that it is cooled, (certainly not boiling hot) and Un-salted. both will kill tomatoes. But cooled water that has not been salted is fine and adds extra nutrients back to the soil.

      Since most potato water is salted, this should not be used. Salt is a natural weed killer and will also damage tomato plants.

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