Easy Homemade Plant Food (Miracle Grow)

Today I am going to show you an Easy homemade plant food that is SO affordable AND it’s actually effective. I will even tell you why it is. Don't forget to visit the blog link below for a special chemist tip and infographic to save for later. The coolest thing about being a chemist would be the experimenting and research of chemicals. Chemicals are truly in everything. Food, beauty products, cleaning products, and especially gardening products like fertilizers.

My easy homemade plant food was made for less than $4.00 and that was for all the supplies. Per batch, it is actually just pennies to make!

Store bought plant food, like Miracle Grow, is great. It is very effective and just easy to buy, but the truth is, these products are massed produced. This means they have numerous chemicals that are unnecessary for your plants. They are really just fillers.

On the other hand, store bought Organic plant foods can get pricey. Especially for the good brands.

The trick for potted plants is an easy, fast acting nutrient dense food that acts like miracle grow!

Easy homemade plant food is the perfect option for any patio gardener. And like I said, it was a total of $4.00 for all these products and you will only use a very tiny amount of each one. So, this means you can get hundreds of batches out of this!

Chemistry Cachet’s Easy Homemade Plant Food

* 1.5 tbsp magnesium sulfate (Epsom Salt – MgSO4)

* 1.5 tsp sodium bicarbonate (Baking Soda – NaHCO3)

* 0.25 - 0.5 tsp Ammonium Hydroxide (Ammonia – NH4OH)

* 1 gallon of water (H20)

In a water container, add all the ingredients. Top with the one gallon of water and stir. I water about 5 or 6 big plants with this. You don’t want to add this entire amount to one plant. A little goes a long way!

Many have asked why such a small amount of ammonia and why the variance in the amount. Ammonia can be potent, so a little tiny bit goes a long way. With hot summer temperatures, I usually go with the 0.25 tsp of ammonia. I don't want to give the potted plant too much that may risk burning leaves. This is very unlikely to happen however. You can use up to 0.5 tsp of ammonia and the solution will be just fine. It will be a little stronger, but equally as safe for plants.

**make sure to check out the blog post for FAQ's and other nutrient options. I know this isn't a complete fertilizer, so please check out the blog url for more tips on this.

Also, this is just a fun, quick solution for potted plants and anyone new to gardening.

Let’s check out why this solution even works. This Fun Infographic shares all the details on why this solution is perfect for plants!



This solution does especially good on potted ferns, geraniums, and hibiscus!

Coming up with this solution was fun and I love how easy it was to put together. Don't miss out on my Extra Chemist Tips at the bottom of the post on one more element you may want to add! Just click the URL at the bottom.

For those that are interested in more garden tips, including our favorite slow release plant food. please check out our eBook.

Find more before and after pictures on the blog below!

Alexis @ Chemistry Cachet
Want more details about this and other DIY projects? Check out my blog post!
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Frequently asked questions

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  • Aggieray Aggieray on Jul 19, 2021

    Can I use this on my orchid. ?

  • L.A. Estrada L.A. Estrada on Jul 19, 2021

    I have a death touch to everything even plants people say are impossible to kill. I am going to try this on the 4 plants that I recently bought. Does it harm herbs? I hope not because I've already killed my basil and spearmint plants. My neighbor gave me another basil plant and yes...I killed that one too.

  • Gemma Danieu Gemma Danieu on Jul 19, 2021

    There are two different amount of water listed: first says 1gallon (128oz.), the second(in notebook) says 8 cups, which is 64 oz.


    Could you please clarify the correct amount of water? Thank you!

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