Overwatered Arborvitae: What Can I Do?

Arborvitae is a unique, decorative tree popularly used as hedges, windbreaks, and privacy screens. This stunning evergreen is a low-maintenance plant that is great for both beginners and experienced plant lovers. Arborvitae is a very strong and hardy tree, however, proper watering is very essential to keep it healthy, and attractive.

Most gardeners make mistakes when it comes to watering this drought-tolerant tree. While some gardeners give it too much water, some others forget to water their Arborvitae.

If you’ve made any of these watering mistakes and your Arborvitae is turning brown, there are a few steps you can take to fix the issue. Here, you’ll learn how to save an overwatered Arborvitae and how to water your Arborvitae properly in the future.

Can You Overwater Arborvitae?

Yes, Arborvitae can be overwatered. Your goal should be to keep the soil moist but not soggy or waterlogged. Although Arborvitae is more tolerant of moist soil than most evergreens, overwatered and poorly drained soil will cause the plant to drown.

Overwatering can be very damaging to this decorative tree, the roots rot and the plant becomes prone to infection when overwatered. If you want your Arborvitae to have a well-developed root system and grow nicely into the ornamental piece you want for your yard, avoid overwatering especially for the younger plants.

How do I Know if my Arborvitae is Overwatered or Needs Water?

There are several ways to identify an overwatered or underwatered Arborvitae. If your Arborvitae tree has been overwatered, you’ll observe the following symptoms: 

  • Discoloration of leaves – the foliage turns yellow or brown majorly on the younger, exterior part of the plant.
  • Leaf dieback -this may occur on some parts of your tree such as the tip of the foliage.
  • Wet soil – an overwatered Arborvitae would have an overly moist/saturated soil, especially around the roots.

You can tell that your Arborvitae tree needs water if you notice these symptoms:

  • Discoloration of leaves – yellowing and browning of exterior leaves, this is different from the browning of interior leaves in fall due to aging.
  • Overall plant weakness – when the tree is underwatered, it loses vigor due to a lack of water and nutrients necessary for growth.
  • Dropping of leaves – normally, Arborvitae leaves also drop naturally in autumn, but if you observe an unusual leaf dropping that goes beyond this, it could be a sign of underwatering.
  • Dry soil – the topsoil of an underwatered Arborvitae would have a pale, dry look and feel.
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For Arborvitae trees, overwatering and underwatering have very similar symptoms. This can be very tricky, so you’ll need to be cautious and check your plant soil to be certain that your plant has been overwatered or underwatered. 

Oftentimes, merely checking the topsoil will not help you tell correctly if your soil has been overwatered or needs water. If your Arborvitae is just newly planted, you can use a long screwdriver or perform a simple finger test by dipping it a few inches into the soil to check if it is dry or waterlogged. 

For giant Arborvitae, you may need to dig a small hole down to 10 inches deep on the outer corners of your soil. If it’s still very wet or soaked in water, your Arborvitae is overwatered. But if the soil is dry with a pale appearance, then it could be that water doesn’t get to the tree’s roots and your plant is in dire need of a drink.

How to Save an Overwatered Arborvitae?

If you’ve accidentally overwatered your Arborvitae, stop watering and let the soil dry for a while before you water again. Overwatered Arborvitae trees would normally attract fungi, bacteria, and some other pests. So you may also have to deal with fungal diseases too if you’ve left your plant to sit in water for long.

Here are a few steps you should follow to save overwatered Arborvitae:

1. Stop watering and let your plant soil dry up

The first step you want to take to save an overwatered Arborvitae is to stop watering it immediately. Once you discover that your tree is overwatered and struggling to breathe and survive, stop watering it temporarily to allow the soil to dry up.

Leave your Arborvitae and let it dry for 7-21 days, depending on how much you have overwatered it. You’ll need to be proactive and check the soil from time to time using the finger test or a moisture meter to know when it has dried up so you can start watering again.

2. Loosen and aerate your soil

This is something you’ll want to do to your soil to improve the supply of oxygen and nutrients to your tree. Overwatering makes the soil compact, leaving little or no space for sufficient oxygen to reach the roots.

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Aerating your soil would help it dry out and create space for the easy flow of oxygen to the roots. The simplest way to loosen and aerate your soil is by digging and turning it over with a pitchfork. This will break up and create space between the compacted soil particles.

3. Adjust your soil

An overwatered Arborvitae is often a sign of a much bigger issue – poor soil drainage. A well-draining soil retains just enough moisture for your plant, and not too much.

If you’ve already planted Arborvitae in poorly-draining soil, you can amend it by adding mulch to the topsoil or elevating the soil with hilling. Elevating the soil with hilling would help to prevent waterlogging even when it rains. You’ll only need to use a shovel to make a hill with the soil.

4. Water Arborvitae properly

To ensure you don’t have to go through this trouble again, water your Arborvitae properly as described below in this article. Also, make sure you inspect your Arborvitae after it rains to discover where the rainwater is pooling.

Check if the water is moving downhill nicely, collecting at the base of the tree, or if a rain downspout is emptied close to your Arborvitae and adjust it.

arborvitae-thuja

How Much Water Does Arborvitae Need?

Arborvitae needs to be watered deeply and thoroughly. But ensure you’ve planted it in well-draining soil. For Arborvitae trees, deep soaks are preferable to ensure that the water gets to the roots. So for larger Arborvitae trees, about 10 gallons or 37.85 liters of water per inch of the tree’s diameter is recommended.

You’ll need to provide Arborvitae with enough water to maintain a constantly moist, but not soggy soil.

Also keep in mind that Arborvitae becomes fairly drought-tolerant once it is established, so they wouldn’t need to be watered as often as younger trees. 

If you’re in hot weather, you’ll need to water your Arborvitae more to maintain the soil moisture content. And as the weather becomes cooler, you might not be required to water as much again.

To make sure that you have given Arborvitae enough water, you’ll want to ensure there is moisture five inches deep into the soil using your finger.

How Often Should You Water Newly Planted Arborvitae?

Arborvitae is evergreen, so most people ignore their plant until it starts turning brown. Newly planted trees require more attention and water than already established ones. For the entire first season after planting, give your Arborvitae tree a deep soaking to get rid of air pockets in the soil.

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A weekly soaking is better for your newly planted Arborvitae during the first week instead of daily splashes that don’t reach the roots. For areas with intense heat, you can consider giving your young plant a deep soaking twice weekly.

So sprinklers are not as effective as soaker hoses when it comes to watering your newly planted Arborvitae. After the first week, continue to offer deep soaking that’ll penetrate the root balls weekly. If you’ve planted it in a container, water it at least once in two days, especially when planted in sandy soil or when the weather is very hot.

The best time to water Arborvitae is in the mornings. But you should check your plant and water when it needs it. To conserve moisture, especially in very cold seasons, add a layer of mulch to the soil.

Newly Planted Arborvitae Turning Brown: What to Do?

The most likely reason for the browning of the leaves in a newly planted Arborvitae tree is transplant shock. Arborvitae trees often suffer from transplant shock because of the stress and damage caused to their roots during the transplant.

The damage prevents the proper uptake of water and nutrients to the entire plant, causing the browning and wilting of your Arborvitae leaves, especially at the tips.

You can successfully revive your Arborvitae after a transplant shock, but it’ll take years before it completely recovers. Below are a few tips to help you deal with transplant shock:

  • Water your tree adequately and regularly as discussed above
  • Avoid moving or transplanting your Arborvitae tree for at least one or two seasons to prevent further stress on your plant
  • Do not fertilize your newly planted Arborvitae for at least ten to twelve months, simply apply a deep layer of mulch a few inches away from the tree trunk
  • Pruning your Arborvitae can stress it. Only prune when necessary (to remove dead or decaying parts). 

Other common reasons why young Arborvitae trees turn brown include:

  • Underwatering
  • Overwatering
  • Extreme weather conditions
  • Winter burn
  • Fungal diseases

Some of the ways to prevent these issues include:

  • Water your plant frequently, especially during summer and fall.
  • Prevent winter burn by wrapping your Arborvitae in burlap or planting in a location that is sheltered from harsh wind and freezing weather in winter.
  • Prune Arborvitae in spring or summer to boost plant health and encourage growth.
  • Plant Arborvitae in well-draining soil to prevent soggy roots and fungal diseases.
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About Rinkesh

A true environmentalist by heart ❤️. Founded Conserve Energy Future with the sole motto of providing helpful information related to our rapidly depleting environment. Unless you strongly believe in Elon Musk‘s idea of making Mars as another habitable planet, do remember that there really is no 'Planet B' in this whole universe.