Gardening is a work requires a lot of patience, time and dedication. Just doing it for a day or week doesn't necessarily be enough. You need research and buy a lot of stuff to even cultivate a single crop. But that is why people do it, although you need a lot of things for gardening, the end result is always a good thing.
Gardening or cultivating a crop yourself gives you a lot of advantages, such as:
Fresh food source which is organic especially if you don't use fertilizer or any chemicals on it.
It could save you money to buy foods. Less expenses is always a great deal.
You decide when will it be harvested.
Different types of fertilizers:
Organic Gardening is where one would use organic fertilizers as well as other organic products. Most commonly used is manures which comes from animals.
Organic products like manures can help you cultivate a better soil with sufficient amount of nutrients for the plant. Chicken manures contains a lot of potassium, phosphorus and nitrogen. Nitrogen in particular is very needed for plant, without it the plants will die.
Blood meals which comes from slaughtered animals also contain a lot of nitrogen which is usually used for some plants which needs a lot of nitrogen. Some examples are tomatoes, peppers and cucumbers.
Fish emulsions have a lot of nitrogen which could cause burn and lower the growth rate of the plants if applied too much or directly. Although if it is diluted using water, it could be beneficial especially for young seedlings.
With these way and type of gardening, we could create as well as preserve our environment without using or relying on chemicals too much.