My mother in law always did this, I though it was the chemicals in the peel that made it work so well. Just flatten a banana peel and bury it under one inch of soil at the base of a rosebush. The peel’s potassium feeds the plant and helps it resist disease...works for tomato plants too.
Soaking seeds before planting is an “old time” gardener’s trick that many new gardeners are not aware of. When you soak seeds before planting, you can significantly decrease the amount of time it takes for a seed to germinate. Let’s look at the reasons for soaking seeds and how to soak seeds.… By Heather Rhoades | Gardening Know How
Homemade "Miracle Grow": Get a clean glass or plastic jar, put a little water in it. Add egg shells and coffee grounds until it's about 3/4 full. Top it off w/water and allow to sit in a cool, dark place for about a week, gently shaking once daily. Strain and use the liquid when ready to feed plants.
Perform your soil test by placing a sample into two separate cups or containers. Add vinegar to one. If it fizzes your soil is alkaline. If not, add some water to the second cup and stir. Add baking soda. If it fizzes you have acidic soil. If neither have a reaction your soil is somewhat pH balanced