It takes on average of a few weeks to 3 weeks for vegetable seeds to grow into plants.
Once the vegetable seeds have sprouted it can take several weeks to even several months for the plants to mature and some vegetable plants reach maturity in as little as 30 days such as radishes and other plants can take 2 to 3 months to reach maturity.
You should water a vegetable garden at least 2 times to 3 times per week.
When watering a vegetable garden you should aim for at least an inch of water or 6 gallons of water per square yard of the vegetable garden per week during the growing season.
Although watering needs of a vegetable garden can also vary based on the temperature, rainfall amount and soil type as well as the specific vegetables that you're growing.
If your vegetable garden has sandy soil which drains quickly you may require watering more frequently such as twice a week.
Heavier clay soils hold moisture and may only need watering once a week.
Hotter temperatures as well as dry periods can increase watering needs of the vegetable garden, and cooler temperatures and more rainfall can reduce the amount of watering of the vegetable garden.
Also different types of vegetables have different watering needs.
Beans, corn, cucumbers and squash need more water than other vegetables.
If your vegetable garden is mulched, the mulch helps to retain soil moisture, so you may need to water less often if your garden is mulched.
When watering your vegetable garden you should water deeply and less frequently which encourages deeper root growth and helps the plants withstand periods of dryness.
Watering your garden in the morning is also best as it gives the plants time to dry out before nightfall, which reduces the risk of fungal diseases.
You can also use an irrigation system such as overhead, drip or soaker hoses to ensure the plants get the water they need.