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Apical meristems are crucial for the primary growth of plants. They are located at the tips of roots and shoots. These tissues contain actively dividing cells that help the plant grow taller and extend its roots deeper into the soil.
This type of growth is called primary growth, and it enables plants to grow in height and length.
Apical meristems are essential for plants to reach sunlight and absorb water and nutrients from deeper soil layers.
When fertilizing lawns, however, focusing on apical meristems may not be the most effective strategy, as we are more interested in the regrowth of the grass itself after mowing.

Lateral meristems are involved in the secondary growth of plants. They are found along the sides of stems and roots, and their cell divisions lead to an increase in the thickness or girth of the plant.
This type of growth helps strengthen the plant and allows it to support larger structures.
Lateral meristems include the vascular cambium and the cork cambium.
While lateral meristems are important for the overall robustness and longevity of the plant, they are not as critical for the primary concern in a lawn, which is horizontal growth and recovery after mowing.

Intercalary meristems are most relevant when discussing lawn care and growth. These meristems are found at the base of leaves or internodes, particularly in grasses.
They allow the plant to regrow from the base, which is essential for lawns that are frequently mowed.
When a lawn is cut, the grass can continue to regrow thanks to these intercalary meristems.
Thus, focusing on promoting the activity of intercalary meristems in a lawn through targeted fertilization is the best approach for enhancing lawn regrowth and maintaining a healthy, green lawn.

Vascular bundles are part of the plant's transport system. They consist of xylem and phloem tissues, which are responsible for transporting water, nutrients, and organic compounds throughout the plant.
The xylem moves water and dissolved minerals from the roots to the leaves, while the phloem distributes the sugars produced by photosynthesis from the leaves to other parts of the plant.
While vascular bundles are crucial for the overall health and functioning of the plant, they do not directly contribute to new tissue growth.
In the context of lawn care, targeting vascular bundles would not be as effective for promoting regrowth after mowing compared to focusing on the intercalary meristems.