"This guide explains how to correct nitrogen deficiency in soil using natural nitrogen sources for plants. Nitrogen is the mineral a plant needs in the most significant amounts, and a healthy plant will contain three to four percent nitrogen in non-root tissues."
https://southsideplants.com/blogs/plant-care/homemade-nitrogen-fertilizer-natural-sources-of-nitrogen-for-plants
"Feed your plants—with other plants! It may sound strange, but you can use your own weeds and grass to make homemade fertilizer tea that’s 100% organic. It’s a great boost for your plants in midsummer when soil fertility is running low. Here’s how to make fertilizer tea at home."
https://www.almanac.com/fertilizer-tea-plants-weeds-and-grass
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