Multi-select problem: How does the next paragraph end?

How to rescue dying landscape plants
Assess your plants' watering needs.
Under-watering is a far more common problem than overwatering. As a general rule, each square foot of the landscape needs about 2-3 quarts of water weekly.

Available options: (1). If the plants' water level is consistently below 1-2 quarts, or we can no longer see anyone watering them, the plants should be rescued. Irrigation : To keep watering your plants, fill your sprinklers and water silos with water for every day of the week.; (2). However, once a landscape gets wet, more water is needed. A flowering plant needs 15-20 gallons of water per 4-foot area.; (3). In order to determine how much water you need for your plants' needs, calculate the water needed per square inch. Collect a basic overwatering kit (which is usually 1 gallon-4 liters) of water per inch.; (4). Or, about 20 liters (5.3 us gal) per square meter. Put another way, it needs to receive at least 1 inch (2.5 cm) of rain or water each week.;
(4).