How do I make a commercial fertiliser for plants?

Question

How must I make a commercial fertiliser for Rattlesnake watermelons to grow big?

And also for them to bloom.

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Answer 1

Wow, thank you for sharing the image.

Here is an article that will help you.

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/types-of-organic-fertilizer.htm