Best Time To Water Plants – When Should I Water My Vegetable Garden?

Best Time To Water Plants – When Should I Water My Vegetable Garden?

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By: Heather Rhoades

Advice on when to water plants in the garden varies greatly and can be confusing to a gardener. But there is a right answer to the question: “When should I water my vegetable garden?” and there are reasons for the best time you should water vegetables.

Best Time to Water Plants in the Vegetable Garden

The answer to when to water plants in the vegetable garden actually has two answers.

Watering Plants in the Morning

The very best time to water plants is in the early morning, while it is still cool. This will allow the water to run down into the soil and reach the roots of the plant without too much excess water lost to evaporation.

Watering in the early morning will also make the water available to the plants throughout the day, so that the plants will be able to deal better with the heat of the sun.

There is a gardening myth that watering in the morning will make the plants susceptible to scorch. This is not true. First of all, almost all areas in the world do not get intense enough sun for water droplets to scorch the plants. Second of all, even if you live in an area where the sun is that intense, the water droplets would be evaporated in the heat long before they could focus the sunlight.

Watering Plants in the Afternoon

Sometimes, due to work and life schedules, it can be difficult to water the garden in the early morning. The second best time to water a vegetable garden is in the late afternoon or early evening.

If you are watering vegetables in late afternoon, the heat of the day should have mostly passed, but there should still be enough sun left to dry the plants a bit before night falls.

Watering plants in the late afternoon or early evening also cuts down on evaporation and allows the plants several hours without sun to take up water into their system.

One thing to be careful of if you water in the late afternoon is to make sure that the leaves have a little time to dry before night comes. This is because damp leaves at night encourage fungus problems, such as powdery mildew or sooty mold, which can harm your vegetable plants.

If you are using a drip or soaker irrigation system, you can water right up until nightfall, as the leaves of the plant do not get wet with this form of watering.

This article was last updated on

Read more about General Vegetable Garden Care

When to Water Plants: The Best Time to Water Indoor or Outdoor Garden

Jennifer is a full-time homesteader who started her journey in the foothills of North Carolina in 2010. Currently, she spends her days gardening, caring for her orchard and vineyard, raising chickens, ducks, goats, and bees. Jennifer is an avid canner who provides almost all food for her family needs. She enjoys working on DIY remodeling projects to bring beauty to her homestead in her spare times.

Do you enjoy growing a vegetable garden? What about growing beautiful flowers all around your yard?

Planting can be time-consuming in the beginning but also rewarding. The trick is making sure you care for your plants well.

One of the main parts of caring for plants is knowing how to water them and when to do it. Plants need water, as we do.

I wanted to share with you a few tips on when to water your plants. Whether you’re a flower gardener, a vegetable gardener, or someone who has a few indoor plants, you should find value in learning when is the best time to give your plants a vital ingredient for their survival.

Here’s what you need to know:

When a fellow gardener approaches me looking for help with a gardening problem, the first questions I ask are “How often are you watering your vegetable garden?” and “How are you watering?”

Most vegetables are made up of 70-95% water! In order to grow well they need to obtain nutrients from the soil and then move those nutrients around the plant using a solution made out of water.

So, insufficient water means your plants will be lacking in the nutrients they need.

How and when you water your garden is an important consideration in your overall garden maintenance because a lack of water can have a major impact on your garden and the health of your plants.

Here are nine tips and techniques to help you master the art of watering your vegetable garden this season.

#1: Understand your soil type.

Soil is made up of different sized particles of minerals (sand, silt, clay, rocks), organic matter (living and dead organisms), air, and water.

You may have heard other gardeners talking about what type of soil they have in their gardens. For example, I have clay soil in my yard.

This doesn’t mean I have only clay in my soil. Most soils contain all three particle sizes – sand, silt, clay – in different combinations.

Why does this matter? Soils that have more clay, like mine, are more dense and tend to hold water longer.

If you have clay soil you’ll likely have to water your garden less often since the soil will retain moisture after rain events and manual watering.

Water travels down through sandy soil much more quickly so it doesn’t hold on to moisture for quite as long as more clay-like soil. This means you’ll need to water your garden more often and pay closer attention to how quickly the soil dries out.

How do you figure out what kind of soil you have? If you want a more scientific answer, you can send a sample of your soil away for a test that measures the soil texture (along with other things).

Your local Cooperative Extension Office likely conducts testing. Here’s an example of the kind of test you’re looking for: Michigan State University Extension Home Soil Test.

If you’re feeling experimental you can use this cool chart created by the USDA which walks you through how to do a “feel test” to determine your soil type – Guide to Soil Texture By Feel.

#2: Know how much water vegetables need.

In general, vegetable plants need about one inch of water per week. One inch should be the total amount of water the garden receives – both from rain and you.

But, as we discussed above, how much water your garden actually needs is influenced by your soil type.

If you have clay soil like me, you can probably get away with watering about once a week. If it rains one inch during that particular week you won’t need to give the garden any extra water.

It should hold the moisture from your last rain very nicely! We’ll talk more about this in the next section.

If you have sandy soil that doesn’t hold moisture as well, you’ll likely need to water a bit more. You could experiment with watering twice a week and giving the garden half an inch each time.

Then, monitor your plants’ health and the soil moisture to decide if that’s enough.

If you live in an area that receives frequent rains you may not have to water your garden every week. During spring in Wisconsin, where I live, we get regular rainfalls that are often timed so nicely that I rarely have to water my garden.

But, once summer arrives, the weather is hotter and drier, so I sometimes have to pick up my hose and deeply water my vegetables to ensure they’re thriving throughout this season.

#3: Keep track of how much water your garden is receiving from Mother Nature.

I suggest keeping track of how much rain your garden has received each week by installing a simple rain gauge in one of your beds. (I have this one.)

One thing I’ve realized over the years is that I have no concept of how much water a rain event brings.

There have been times when I could hear the rain pattering on my roof all night long and I felt sure we received several inches of rain.

But, in the morning when I walked out and checked my rain gauge it would say 1/10 of an inch. What?!

That’s why a rain gauge is a more reliable measure of how much rain your garden actually received. Don’t rely on your “sense” of how much it rained.

I find it easier to set a regular watering day each week. For me, it’s usually Monday mornings or evenings.

I keep a mental note throughout the week how much rain has registered in my gauge and water on Monday if necessary.

If it rains an inch or more throughout the week I usually choose not to water my garden that week. You can always dig down into the soil a bit with a trowel to discover how much soil moisture is still present.

Here are some options for simple rain gauges:

#4: Water as efficiently as possible.

Drip irrigation is the most efficient use of water in your garden. But, due to the cost and time involved it setting it up, most gardeners I know (including yours truly) don’t have drip irrigation in their gardens.

If you live in an area that doesn’t get much rain in the summer, drip irrigation will allow you to leave your garden for weeks at a time and not worry about whether your plants are getting enough moisture.

The Encyclopedia Botanica podcast has a two part series on drip irrigation in the home garden if you want to learn more.

If you don’t have drip irrigation, the next best thing is to make sure you’re watering at the base of the plants.

Don’t set up a sprinkler and then walk away from your garden.

Overhead watering is inefficient because a lot of the water is lost to evaporation. You’ll end up with a high water bill and possibly unhappy vegetable plants.

This is because the leaves of squashes, cucumbers, and tomatoes are best left as dry as possible because they’re susceptible to so many fungal and other diseases.

When watering my garden I use a heavy duty garden hose with a watering wand and hold it at the base of each plant for 30-60 seconds. I usually judge when to stop by how quickly the water is infiltrating the soil.

When it starts pooling up a bit around the plant I move on. Yes, this takes a long time if you have a large garden.

That’s why I pray for one inch of rain every week! It’s a good excuse to call a friend and catch up while you’re out there watering.

#5: How to water established plants.

Most of what we’ve talked about so far focuses on vegetable plants that are already established in your garden. You want to encourage your plants to be deeply rooted.

They’ll be the most resilient when they have well-developed root systems that can forage for water throughout the soil layers.

To help encourage this you want to water less often and for a longer duration. Let the water really soak into the soil to encourage the plants’ roots to go deeply into the earth.

Frequent and shallow watering will cause your plants’ roots to stay at the surface of the soil.

#6: How to water newly planted plants.

When you first plant a vegetable seedling it will go through a bit of an adjustment period. It’s not going to be as tough or resilient as your more mature plants.

Be mindful of the fact that it hasn’t established it’s root system yet, so it’s not as able to search for water in the soil.

Give newly planted seedlings a little extra attention the first week or two after they’re placed in your garden beds.

Keep the soil moist to encourage them to grow and establish quickly.

After you see them put on a bit of growth you can transition them onto your once or twice a week watering schedule.

#7: How to water newly seeded vegetables.

If you’re waiting for seeds to germinate, watering once a week will be too little moisture. You need to keep the top of the soil consistently moist until germination.

Depending on the vegetable and the weather, you should be giving new planted garden beds a quick soak every one to two days.

I’ll often use a watering can for this task. I prefer a metal watering can because it lasts much longer than plastic in the garden.

Remember, the different vegetables take various amounts of time to germinate. Spring radishes will poke through the soil in less than seven days, while carrot seeds can take up to three weeks!

Both need to be kept consistently moist until those first leaves break through the soil.

Once seeds germinate you can put them on your regular once or twice a week watering schedule, unless it’s unseasonably hot and dry, in which case they might need some extra water while they establish themselves.

#8: Know the best times of day to water.

The best time to water your garden is in the morning. It’s often cooler, so less water will evaporate during the process.

And even though you’re watering at the base of the plants, some water will inevitably splash up onto the leaves.

Watering in the morning gives the plants’ leaves the entire day to dry out. This is important because water can encourage some diseases spread throughout your garden.

For many of us, our mornings are busy getting ready for work and school, so watering at that time might be impractical for our schedules.

If that’s true for you, it’s fine to water in the evening.

It’s cooler at that time of day as well, so less water will be lost to evaporation. Just be mindful of how much water you’re getting on the leaves of the plants. They won’t be able to dry out as quickly overnight.

The worst time to water is in the middle of the afternoon. It’s not a responsible use of your local water supply and so much water is lost to evaporation.

Plus it’s much more pleasant to be out in the garden in the morning or evening anyway.

Bare soil is a bad idea in the vegetable garden. It’s an invitation for many weeds to grow and your soil will dry out more quickly, sometimes even cracking from lack of moisture.

In contrast, a heavily mulched garden will require much less frequent watering, which means less hours of work for you!

During the height of summer in my garden I’ve noticed a stark difference between the texture and color of the soil underneath the mulch as compared to the bare soil exposed to the sun and elements.

The bare soil is often dried out and beginning to crack from lack of moisture, whereas the soil underneath the mulch is dark, crumbly, cool, and moist.

You can use hay, straw, leaves or grass clippings as mulch in your vegetable garden.

I don’t recommend using woodchips on your garden beds, but in the aisles is fine.

A heavy layer of mulch retains moisture, keeps weeds at bay, helps with disease issues, and breaks down to add organic matter to your soil. (You can read more about mulching your garden here.)

Additional Resources

You can find all of watering supplies mentioned in this article, along with my favorite gardening books, seed varieties, seed starting equipment, and more in my Amazon storefront.

If you’re having challenges in your garden you can’t quite figure out, check out my post 5 Reasons Why Your Vegetable Garden is Struggling.

And along with watering your vegetable garden the right way, another thing you can be doing to set your garden up for success is using an organic fertilizer every time you plant a new crop. Read more about that here.

This season, examine your established watering habits and see how you can do better.

Is there something in this list you can make a part of your regular gardening routine?

If I had to pick one for you, I’d put mulch at the top of the list (even though it was last in this post!). It’s one of the best ways to protect your soil and retain moisture so your plants never dry out from the beating hot sun and warm summer winds.

Understanding how to water is one of the best ways to set your plants, and your garden, up for a successful and abundant season!

And, if you need more help creating a garden that produces abundant harvests AND requires less work, check out these popular posts!

Did you dig this post? Save it for later on Pinterest!

Use the Right Kind of Containers

Many garden containers are porous, which can cause the soil to dry out rather quickly.   Terra cotta containers and coir hanging baskets are notorious for drying out quickly. Metal containers can also dramatically increase soil temperatures in containers, quickly drying soil and baking your plants. You can use containers made from these materials, but you must monitor them closely and water them more often than you would plastic or glazed ceramic containers.

Where practical, purchase the largest containers you can that are appropriate for the area where you will place them. The general rule of thumb is that outdoor containers should be no smaller than ten inches in diameter any smaller and they dry out too quickly and the containers can quickly become root bound.

Larger containers hold more soil and moisture to provide roots with enough space to grow and absorb water and nutrients. The smaller the pot, the more diligent you need to be monitoring soil moisture levels.

Container Plants

When it comes to container plants, water almost functions like fertilizer: well-irrigated plants show lush growth, while plants that are just getting by on irrigation look stunted and shabby. During the summer, rules about when to water are less important for container plants. The best time to water could be twice a day, once in the morning to give plants a boost before the sun begins to bake down, and once in the evening to replenish what the day took away. The smaller the container, the more you will be filling up the watering can so choose pots with at least an 18-inch diameter.

Beware of over watering

Plants can have too much of a good thing – and while the surface might be dry, the soil 15-20cm down, might not be. Most plants will have a greater root depth so could well be pulling up water that you can’t see.

The best rule of thumb is if the plant is not wilting it probably has access to water. Some herbaceous plants will wilt in full sun to save moisture but will then rehydrate as the temperature cools later in the day (temporary wilting). My garden lupins are doing this on a daily cycle at present, but they are deep rooted and they do pick up in the evening.

Position plants in the shade if possible as they will need less water. Shutterstock

You must keep containerised plants well watered. Water on to the soil and water in the evening. As with any other watering, water thoroughly and then not again until there is sign of need. Greenhouse tomatoes will probably need watering daily at present. And if you are growing carrots make sure the soil stays moist or you may end up with split roots.

Your lawn will probably be looking quite dry, but don’t worry too much about this – as grasses die back when dry but can regrow quite quickly when the rains return. One things to remember though, is to avoid excessive walking on a brown lawn or you will end up with bald patches – this is because the combination of drought and heavy wear are just too much for your lawn to handle.

So the message is clear, enjoy your garden in the heat, but remember that your plants are similar to us humans – they too enjoy a bit of shade and a nice drink.

Watch the video: The Best Time to Water Plants


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