Saturated soil can slow grass growth. When wet, the grass is at risk of root rot and fungal diseases that weaken the turf, leading to poor seed germination and reduced growth.
Sunlight is vital for photosynthesis, which fuels healthy grass growth. Too much shade or a lack of sunlight can stop meaningful growth.
Weed invasion stunts the development of young grass due to competition for amenities like water and nutrients from the surrounding environment. Low topsoil fertility caused by inadequate nitrogen levels prevents successful germination and efficient absorption of minerals necessary for encouraging strong root systems.
Disease proliferation causes spots and discoloration on grass blades, weakening their structure and boosting susceptibility to pests like bugs and weeds. Poor maintenance also can diminish progress; regular mowing helps keep it in balance, but over-mowing reduces its strength as well as promotes an abundance of weeds.
Ultimately, limited resources, bad conditions, and fierce competition leave you with a sparse lawn instead of a healthy one unless you take necessary precautions through irrigation management and fertilization practices, among others.