Banana Peel Tea: Secret Weapon for Your Cannabis Garden

Banana Peel Tea: Secret Weapon for Your Cannabis Garden

Want to give your plants an extra boost of Potassium, Phosphorus, and even some Calcium and Magnesium too? Then, you’ve come to the right place. Banana peel tea is a cheap, all natural fertilizer for under $5.

This method does take some preparation and time but it’s well worth it. It can be used as a liquid fertilizer for vegetative growth, liquid PK booster for flower and even a powder rooting aid. The tea can be used on your plants during all stages of growth but will give the most benefits during flower.

Benefits of Using Banana Peel Tea

  • Phosphorus helps to increase the number of flowers
  • Phosphorus is important for germination & proper root development
  • Potassium helps increase the weight/density of the flowers
  • Potassium helps strengthen the plants resistance to pests
  • Calcium is important for plant cell structure and controlling nutrient uptake
  • Magnesium is the central molecule in chlorophyll and important for photosynthesis

What You’ll Need:

  • Pitcher or large jar
  • Large jar for storage
  • Water
  • Banana peels

How to Make Banana Peel Compost Tea

First, you need to fill a pitcher of large jar 3/4 full of distilled water and place it in your refrigerator. Now, every time you eat a banana, simply throw the peel into the pitcher or jar. Continue adding peels until the container is full or roughly seven days. Once the container is full, you can strain the solution into another container for storage.

This solution will be to concentrated, so you have to dilute it with water before feeding your plants. If you’re using other forms of fertilizers already, it’s best to be cautious and use less. After you monitor the plants, you can assess whether to increase the amount. The banana compost tea is not a complete fertilizer but rather an addition to your fertilizer line up.

Powdered Banana Peel Root Aid

Now that you removed those banana peels from the pitcher or jar, don’t throw them away. You can use them to make a rooting aid for seeds, seedlings and for transplanting. All you need to do is dry them. You can dry the peels using a dehydrator, oven or the sun.

  • Dehydrator – 160°F/71°C for 8-10 hours
  • Oven (on parchment paper) – lowest temperature possible for roughly 6-8 hours*
  • Sun – Lay in direct sunlight until completely dry

*Note: Oven temperature ranges vary depending on model*

Place the dry peels into a food processor or coffee grinder and break them down as much as possible. You can use this powder to help with germination in soil, seedlings and plants being transplanted & cloning.

How to Use Banana Peel Compost Tea

  • Vegetation – add 1/4 – 1/2 cup tea to 1 gallon of water; feed once a week
  • Flower – add 3/4 – 1 cup tea to 1 gallon of water; feed once a week

How to Use Powered Banana Peel Rooting Aid

  • Sprinkle approximately 1 tsp of powder in soil where seed/seedling will be planted
  • Mix with 2 Tbsp fresh aloe vera gel for dipping clones before planting

Foliar Spray/Aphid Repellent

You can also dilute this solution at a radio of 5:1 (5 parts water, 1 part tea). This can be used as a foliar feeding spray or as a repellent against aphids. Apparently, they hate the smell of bananas. Just lightly spray your leaves and stems during lights out. You can reapply/feed once a week if desired.

For more D.I.Y recipes, check out the following links:

DIY Calcium Phosphate for creating DIY CalMag+

Sweet Raw for Under $5

DIY Nitrogen Rich liquid fertilizer

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53 thoughts on “Banana Peel Tea: Secret Weapon for Your Cannabis Garden

  1. I made mine with tap water and left in Rome temp. Will it be worth anything or did I just waste my waste. I read this months back and one day thought I would make some but couldn’t find this post. Until I already had it setting for three days.

    1. Thanks for the question. You can use the banana if you want but it will be much more concentrated than the peels. This was a way to use the “waste” from it after you eat it. You can absolutely use it though, just dilute it more

  2. Great, thank you! I have been intuitively doing something very similar to water my plants. But I will also try this to protect from bugs and mould, thank you!!

    1. You could use it for that, but it could be caused by other things as well. You can give the same dosage I recommend on the post. It should do just fine.

    1. You can feed them this anytime until about the 6th week of flower or about 2 to 3 weeks before harvest. If using during vegetation, add something for nitrogen also, like coffee, tea or weeds.

  3. I mixed a sliced banana 1/4″ peel and all..dried it in the oven till it was dry outside but still had moisture inside..mixed into my potting soil in a 2 gal pot.. 2x growth…

  4. Ok thanks.. I would estimate that I have had my tea for about two weeks. One week for preparation, I used last Tuesday and plan to use again tomorrow.
    I raised the question as the tea doesn’t smell as strong (banana scent) as when first concocted, might even say there’s a stale scent, so was just curious.

    1. I wouldn’t keep it much longer than a couple weeks. It’s better to use it as soon as possible to avoid smells. But I’ve used stuff that I had kept for a few weeks and it was still fine. I would also recommend letting the banana peel tea get up to room temperature before feeding.

      1. Ok thanks.. I would estimate that I have had my tea for about two weeks. One week for preparation, I used last Tuesday and plan to use again tomorrow.
        I raised the question as the tea doesn’t smell as strong (banana scent) as when first concocted, might even say there’s a stale scent, so was just curious.

  5. This blog is so nice and useful! I’ve been searching for a complete banana tea recipe for weeks! Thank you so much 🙂

    1. It will last slightly longer if you do but just make sure to warm it to room temperature before watering the plants. I don’t usually refrigerate mine because I make smaller batches so it doesn’t get funky smelling.

        1. I’m sure you could drench your soil with this mixture, just add water to dilute it and you’ll be fine.

        2. 1 airieater
          Wormcastings ( 1-2 handfuls )
          Can use bout anything from epson salt to ?
          Unsulferated molasis ,,2-4 oz’s
          Add molasis to warm water to mix,, r it tends to clog hailstones
          Brew for 24 hrs & use immediatly

  6. I planted a seed normally then it wasn’t growing so I kinda got mad poured water kinda too fast and under the dirt I found the root with some leaves so I replanted with the leaves sticking out of the dirt and its having so problems growing I think it’s in shocked so I’m gonna try this when the soil drys out hope it helps with the root like u said not saying I dont belove I just think my plant us kinda fucked :/ I’m gonna try everything to save this little dude :/

    1. Hey man just take your time, I did kind of the same thing except I pulled another root out (had a volunteer clover start growing and I let it grow since clover fixes nitrogen for other plants) and it totally made my plant loose it’s footing and it fell over just about sideways. Just continue to make sure the root is surrounded by soil and hopefully it will eventually get it’s footing again. Also just saw this on another site-

      “Lentils or bean tea

      Root stimulants rich in auxins

      Auxins represent a very important group of phytohormones that regulate plant growth and phototropism (movement of leaves and stems in search of light), causing branches to grow vertically by elongation of plant cells.

      The auxins have traditionally been used in gel form for root development in cuttings and seedlings, as is the case of Clonex, one of the best known products for marijuana, and although it is true that they work very well in synthetic form, we can also find them in culture broths formed by organic products such as seaweed, and teas made from seeds rich in auxins, as occurs with certain species of legumes and pulses.

      The teas made with these natural products are simple to make, as they are based simply on leaving the vegetables in water for a day, until they are completely hydrated. We can also heat the broth a little to help in the extraction of the nutritive compounds, then it is beaten and the resulting paste is strained. The final water, or broth, contains the nutritive extract rich in auxins, and is ready to use for rooting cuttings.”

    2. Sounds like youre medium was wet and soggy and the seed dampened off. Then to add insult to injury you uprooted it. Even if you get it going which you likley wont it will be stunted and likley develop problems. Hmmm i grow gals not dudes lol

  7. i just finished up my tea, i’m currently drying the peels. Thanks for the recipe. I’m really looking forward to using it. I’m all organic so this is awesome.

    1. I don’t think it would work in hydro, unfortunately. I’ve only ever used it with soil

    2. why could you not just dehydrate the banana peels into a powder then add molasses and water and let it sit for a 2-3 weeks .? You would then strain to have your banana peel extract , add that to your hydro feeding schedule. Basically the same as when they make extract kelp/seaweed

      1. I guess you could. I just didn’t want to recommend something that I wasn’t 100% sure it was safe to use. I’m not as knowledgeable about hydro. I’m not an expert, just a novice soil grower.

  8. I have been saving banana peels. I dry them on a hanger, chop them and add to my soil. I will try the spray for aphids.
    Thank you

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