Different conditions are there for the effective growth of different plants.
The main growth-regulating factors are light, air, temperature, nutrients, and plant hormones.
Sufficient light is required for plants in the photosynthesis process.
Less light causes less production of sugars and carbohydrates needed for plant growth.
Therefore right light balance is required for faster growth.
Plants need air to make food.
Good circulation of air helps in getting high energy from the food.
Certain temperature is needed to maintain growth and prevent damage to plants.
Many plants prefer cooler temperatures, e.g- beets and carrots.
Different kinds and different amounts of nutrients are required for plants to germinate, grow and fight against pests.
The macronutrients such as carbon(C), hydrogen(H), oxygen(O), nitrogen(N), sulfur(S), phosphorus(P), and potassium(K) are given in sufficient amounts for effective growth.
Plant hormone such as gibberellic acid stimulates cell division and elongation, and natural auxin(IAA) stimulates rooting and apical dominance.
Therefore, these hormones significantly helps in plant growth.