Plants absorb their required level of nutrients straight from the soil. Increasing the amount of fertilizer can cause waste.
PLANTING TOO CLOSE TOGETHER
Planting the seeds or seedlings too close to each other encourages competition. They fight among themselves to get the water, sunlight, and nutrients.
USING CHEMICAL FERTILIZERS
They can leave salt build up which can weaken the growth of your plants.
NOT ENOUGH SUN
There are vegetables such as lettuce and peas that grow well in shady areas. However, most plants require at least six to eight hours of sun.