Large white petunia will move through several different growth stages throughout the year, some of which may require more water than others. For example, you will probably start your
Large white petunia as a seed. While the seed germinates, you should plant to give more water than your
Large white petunia will need later in life, watering often enough to maintain consistent soil moisture. After a few weeks, your
Large white petunia will grow above the soil and may need slightly less water than at the seedling phase. Then, once this plant is mature, you can begin to use the regular watering frequency of about once per week. As flower development takes place, you may need to give slightly more water to aid the process.