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This is the best time of day to water a vegetable garden – experts reveal the ideal hours to water, and the times to avoid
By Drew Swainston,
8 days ago
Watering is a constant in the vegetable garden during the summer months. No matter where you live or the size of your vegetable garden, you will undoubtedly spend many hours watering your plants when the temperatures rise.
There are lots of ways to water crops; you can use a watering can, hoses, sprinklers, or an automated irrigation system. No matter how you irrigate your vegetables, choosing when to water plants can help maximize the water you use and keep plants healthy.
Some times of day are better than others and there are certain times you should avoid watering a vegetable garden . If you can fit the better times to water into your busy schedule, your plants will benefit the most.
Watering a vegetable garden at the best time of day will help to grow large crops (Image credit: Getty/Maxim Chuvashov)
When is the best time to water a vegetable garden?
To help you grow the healthiest and happiest vegetables in your garden we reveal the best times of day you can choose to water. In addition, we look at the times of day to avoid watering your vegetables, and why.
Water early in the morning
Watering a vegetable garden can be a daily task in the summer (Image credit: Getty/Klaus Vedfelt)
The best time of day to water a vegetable garden is early in the morning. If you have the time to add watering to your daily schedule early in the day, before going to work or taking the kids to school, your plants will benefit greatly from it.
Watering at this cooler time of day means there is more time for the water to soak into the soil and get taken up by the plants, rather than being lost to evaporation. As the day warms up, more water evaporates away from the soil and plants start to transpire, so try to avoid watering any later, and definitely not at peak heat of the day.
Mariah Henry , director of Urban Agriculture at Carolina Farm Trust, claims ‘5am-7am is best’ and recommends avoiding the afternoon during the hotter months ‘to increase water retention’.
She says: ‘When it's warmer outside the water can evaporate and reduce the plants' ability to absorb water.’ It would be a garden watering mistake to head out with the hose or switch the sprinklers on in the middle of the day as plants won’t gain as much at the hottest times.
Another advantage of early morning watering is that any water that gets on the foliage has a long time to dry before the cooler temperatures of nighttime arrive. Wet foliage left overnight makes plants more susceptible to fungal diseases like powdery mildew and downy mildew.
Gerry Murphy , owner of Growseed, also adds that getting out early to keep the soil moist in summer means your plants are best prepared to face the sun. ‘Morning watering ensures plants are well-hydrated before the heat of the day, which is especially important during hot weather,’ says Gerry.
Or, water in the evening
Watering earlier in the day gives foliage lots of time to dry (Image credit: Pavel Rodimov / Alamy Stock Photo)
The morning is the most efficient time to water a vegetable garden, however, if you cannot fit that into your schedule then the next best option is the evening. Again, it is cooler in the evening and water is not lost to evaporation.
‘If you miss a morning watering, don't fret. Pick back up in the early evening,’ says Mariah Henry. However, one added risk of watering later in the day is that wet foliage cannot dry off and sits wet overnight. This is primarily a cause for concern if you water your vegetable garden with a sprinkler or garden hose.
For some, it may depend on how you water
Drip irrigation gets moisture to the roots where plants need it moist (Image credit: Getty/firemanYU)
When is a good or bad time to water the vegetable garden may depend on how you water plants . Using sprinkles or hoses magnifies the risk of wet foliage, but the risks are less with drip irrigation.
Drip irrigation or soaker hoses can be useful tools to get water to the base of the plants and into the root zone where it is most needed. Shawn Jadrnicek , extension agent for Virginia Tech, claims you can water ‘anytime’ with a drip irrigation system as the leaves won’t get wet, however, there are still preferred times to use such systems.
‘The best time with drip is when the plants need the water which will be when the sun is shining,’ says Shawn. ‘With drip irrigation, you want to keep the soil around the plants close to saturation and you don’t want to push water past the root zone. Typically this will involve more frequent watering for a shorter time.’
To avoid potential fungal problems, always soak the base of the plants and avoid getting the foliage wet by not simply watering from above with a can or hose.
Shop drip irrigation essentials
Soaker Hose
A soaker hose that leaks at the rate of 3 gallons per 1 minute and distributes water evenly along the whole weeper hose. The garden soaker hose is easy to unfold, move around and install.
Programmable Timer
A programmable timer that is easy to set up and use. It can water from every 6 hours up to every 7th day with watering durations ranging from 1 to 240 minutes.
Drip Irrigation System
A drip irrigation set up that can be customized to your set-up. It contains sprayers, drip emitters, and drip line to feed vegetable gardens, potted plants, flower beds, greenhouses, or raised garden beds.
FAQs
Can I water a vegetable garden overnight?
It is not advisable to water a vegetable garden overnight. Watering plants at night not only increases the risk of diseases from wet foliage but may also lead to an increased presence of slugs and snails that are more active in wet conditions. You cannot monitor overnight watering and this may lead to an increased risk of waterlogging and overwatering unless you invest in timers for any irrigation system.
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