I Started Using This Leftover Kitchen Liquid On My Spider Plants — And It Actually Worked

Spider plants are usually described as “unkillable,” and honestly, that’s why I ignored mine for years. They survived missed waterings, low light, and the occasional cold draft without complaint. But surviving and thriving aren’t the same thing, and I eventually noticed mine looked more static than lively.

Photo by Ravi Kant

The change came from something I already had in the kitchen: rice water. I didn’t expect much when I tried it, but over time, the difference in leaf color, fullness, and baby growth was obvious.

Why rice water made sense to me

Rice water is simply the leftover liquid from rinsing, soaking, or cooking rice. Instead of pouring it down the sink, I started using it sparingly on my spider plants.

Here’s why it works so well:

  • It contains starch that plants store as slow-release energy
  • It delivers small amounts of nitrogen, phosphorus, and potassium
  • It supports beneficial microbes in the soil

What surprised me most was how gently it works. This isn’t a fast, artificial push like synthetic fertilizer. It feels more like steady support.

How often I actually use rice water

Less is more. I learned that quickly.

My routine now looks like this:

  • Once a month during spring and summer
  • Once every other month in winter
  • Always diluted and never applied to already wet soil

Using rice water too often caused issues early on. I noticed soil crusting and a faint sour smell once, which told me I was pushing it too far.

The types of rice water I’ve tested

Over time, I experimented with different methods. Each one works, but some are easier than others.

Soaked rice water (my go-to)

  • Mix 3 parts water to 1 part rice
  • Let it sit for 30 minutes
  • Stir occasionally until the water turns cloudy

This method feels like the safest and most balanced option.

Cooked rice water

  • Boil rice in extra water
  • Drain once the water turns milky
  • Let it cool completely before use

I use this occasionally, but only when heavily diluted.

Fermented rice water (advanced use)

  • Cover cooked rice with water
  • Let it ferment for up to two weeks
  • Strain and dilute heavily before use

This version is potent. I only use it when a plant looks sluggish, and never on a regular schedule.

Mistakes I stopped making

Rice water helped, but only after I stopped doing these things:

  • Applying it every time I watered
  • Using it on dry, stressed plants
  • Forgetting to dilute fermented batches
  • Treating it like fertilizer instead of a supplement

Spider plants are forgiving, but their roots still need air and balance.

What I see when it’s working

When rice water helps, the changes are subtle but consistent:

  • Leaves look glossier and more upright
  • New shoots appear more frequently
  • Baby spider plants root faster
  • Growth feels steady, not forced

That’s when I know it’s doing its job.

My takeaway as a houseplant owner

Rice water didn’t turn my spider plants into showpieces overnight. What it did was support them quietly, the same way good soil and light do. I treat it as an occasional boost, not a routine habit, and that’s made all the difference.

Sometimes the best plant care upgrades aren’t new products at all — just smarter use of what’s already in the kitchen.