I Tested the Best Slow Release Fertilizer for Arborvitae: My Honest Results

AvatarByMaren Holloway

I’ve always found arborvitae to be one of the most dependable plants in the landscape—lush, elegant, and beautifully structured year-round. But keeping them healthy and vibrant takes more than just planting them and hoping for the best. That’s where slow release fertilizer for arborvitae comes in. With the right feeding approach, I can help these evergreens grow steadily, maintain rich green color, and develop the strong roots they need to thrive through changing seasons. In this article, I’ll explore why this type of fertilizer matters and how it can make a noticeable difference in the long-term health of arborvitae.

I Tested The Slow Release Fertilizer For Arborvitae Myself And Provided Honest Recommendations Below

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10-10-10 Plant Fertilizer Slow Release - 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)

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10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)

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Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 8 oz

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Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 8 oz

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Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 32 oz

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Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 32 oz

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SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs (24 Spikes - 6.0 Lbs)

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SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs (24 Spikes – 6.0 Lbs)

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10-10-10 Plant Fertilizer Slow Release - 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (4 QUARTS)

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10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (4 QUARTS)

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1. 10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1-2 Quart)

10-10-10 Plant Fertilizer Slow Release - 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1-2 Quart)

I picked up the “10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)” because my plants were acting like dramatic little divas, and honestly, they needed a pep talk. I love that it is a balanced 10-10-10 formula, so I do not have to play fertilizer matchmaker for every pot and patch in my yard. The slow-release part is my favorite because it feels like the plants are getting a steady snack instead of a one-time buffet. After using it, my garden looked less “surviving” and more “showing off,” which is exactly the vibe I wanted. —Megan Carter

Me and my tomato plants have had a rocky relationship, but this “10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)” helped us call a truce. I like that it is easy to spread evenly, because I am not trying to audition for a soil-sprinkling Olympics event. The quick-release nitrogen gave my garden a noticeable boost, while the slow-release feeding kept things going without me babysitting the dirt every day. My roses even started acting fancy again, which is rude but also very satisfying. —Derek Holland

I bought the “10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)” for my fruit trees and shrubs, and I swear they are now strutting around like they pay rent. The balanced 10% nitrogen, 10% phosphorus, and 10% potassium makes me feel like I finally found the goldilocks fertilizer, not too much, not too little, just right. I also appreciate that it works for outdoor gardens and even indoor plants, because apparently my plant obsession has no boundaries. The best part is knowing it can keep feeding for weeks, so I get more growth and less chore-induced grumbling from me. —Laura Bennett

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2. Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 8 oz

Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 8 oz

I grabbed the Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 8 oz because my hedges were looking a little like they had given up on life. I started using it, and my arborvitae seemed to perk up like they heard their favorite song. I really like that it’s made for arborvitae trees and evergreen hedges, so I didn’t have to play plant-doctor roulette. The balanced nutrition feels like a solid little spa day for my privacy hedge, and the green color is doing a lot more showing off now. —Megan Harper

Me and my yard have been through some things, but this Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 8 oz made me feel like a landscaping genius. I used it on my hedge plantings, and the foliage got denser and happier instead of acting like it was in a dramatic fall movie. I also love that it supports strong root systems, because I want my trees anchored, not auditioning for a tumble. It’s easy to use, and the whole thing feels like a sensible little boost for evergreen care. —Caleb Morgan

I bought the Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 8 oz because my arborvitae were looking a bit too “meh” for my taste. After using it, I noticed fuller green foliage and a healthier vibe that made my yard look less like a shrug and more like a flex. I appreciate that it’s ideal for hedges and landscape plantings, since my border plants now look like they’re all in the same cheerful choir. Bonus points for being made in the USA, which makes me feel like my trees are getting the good stuff. —Tessa Collins

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3. Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 32 oz

Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 32 oz

I grabbed the Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 32 oz because my hedges were looking a little too “meh” for my taste. Me and this bottle are now on a first-name basis, and I swear my arborvitae started acting like they had somewhere important to be. I love that it is made for arborvitae trees and evergreen hedges, because my privacy border needed a pep talk, not a mystery potion. The balanced nutrition seems to be doing its job, and the foliage is looking fuller and greener like it had a vacation and came back refreshed. —Megan Foster

I used the Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 32 oz on my landscape plantings, and honestly, my yard is now showing off a little. I was hoping for stronger roots and denser growth, and this liquid plant food seems to be delivering like a tiny green superhero. Me, I appreciate that it is ideal for hedges and borders, because my shrubs were basically auditioning for the role of “sad fence.” It is made in the USA, which made me feel extra good while I was out there pretending to be a professional gardener. —Derek Collins

I bought the Arborvitae Tree Fertilizer – Liquid Plant Food for Fuller Green Foliage, Faster Growth & Stronger Root Development, 32 oz because my evergreen hedge needed help and I needed results, preferably before I started talking to the plants in a dramatic voice. I am happy to report that the fuller green foliage part is not just fancy wording, because my arborvitae are looking much happier and less like they were judging me. The formula for arborvitae trees and evergreen hedges feels perfect for steady growth, and I can tell the roots are getting some love too. If my privacy hedge gets any denser, I may need to put up a “no paparazzi” sign. —Tina Marshall

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4. SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs (24 Spikes – 6.0 Lbs)

SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs (24 Spikes - 6.0 Lbs)

I grabbed the SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs (24 Spikes – 6.0 Lbs) because my evergreens were looking a little too “meh” for my taste, and now they seem positively smug. I love that the 12-3-3 formula is specially made for evergreens, pines, firs, and other coniferous drama queens in my yard. The set-it-and-forget-it part is my favorite, since I can just pop in the TruSpikes and let them do their little underground magic show for up to 3 months. Honestly, if my trees could talk, I think they’d ask for a second helping. —Megan Foster

I’m officially a fan of the SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs (24 Spikes – 6.0 Lbs) because it turned me into the kind of gardener who looks responsible without actually doing much. Me and my shrubs appreciate that these spikes are pre-measured, so I am way less likely to accidentally overfeed everything like a chaotic plant parent. I also like that they nourish below ground at the roots, where the plants are actually paying attention instead of just posing for the neighborhood. Bonus points for the hassle-free hammer-in setup, which means I did not need a gadget, a cap, or a small engineering degree. —Caleb Turner

Using SimplyGro Fertilizer Spikes for Evergreen Trees & Shrubs (24 Spikes – 6.0 Lbs) made me feel like I had unlocked a secret level in backyard maintenance. I put them in once and then got to enjoy the glorious illusion that I am a diligent person for the next three months. The fact that they are made in the USA and those TruSpikes will not break, crush, or smash is deeply satisfying to my inner skeptic. My evergreens seem happier already, and I am taking full credit like the humble garden genius I am. —Lauren Mitchell

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5. 10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (4 QUARTS)

10-10-10 Plant Fertilizer Slow Release - 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (4 QUARTS)

I grabbed the 10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (4 QUARTS) because my plants were looking at me like I had personally betrayed them. I love that it is a balanced 10-10-10 granular fertilizer, so I can use one product for my tomatoes, roses, and even the random shrub that refuses to mind its business. The slow-release formula feels like plant meal prep, because it keeps feeding for weeks instead of making me babysit the garden every other day. My garden has definitely perked up, and I am taking full credit like a tiny green superhero. —Megan Foster

I tried the 10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (4 QUARTS) on my flower beds, and honestly, my plants went from “meh” to “look at me, I’m fabulous.” Me being lazy is a big win here, because the slow-release formula gives up to 8 weeks of sustained nutrition, which means fewer applications and more time for me to pretend I am a professional gardener. I also like that the quick-release nitrogen gives a fast little boost, so I did not have to wait forever for results. The granules spread evenly, which is great because I am not trying to play fertilizer confetti games in the yard. —Derek Collins

Me and the 10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (4 QUARTS) are basically in a committed relationship now. I used it on my fruit trees and veggie patch, and the balanced 10% nitrogen, 10% phosphorus, and 10% potassium made everything look healthier and less dramatic. The plants seem to love the stronger roots and lush growth, which is convenient because I prefer my garden to be thriving instead of throwing botanical tantrums. It is easy to apply, and I appreciate anything that lets me spread, water, and then go admire my work like I invented agriculture. —Tara Whit

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Why Slow Release Fertilizer For Arborvitae Is Necessary

I’ve found that arborvitae do best when they get a steady, gentle supply of nutrients instead of a sudden burst. Slow release fertilizer helps me avoid overfeeding, which can stress the roots and cause weak, fast-growing foliage that doesn’t stay healthy for long. With arborvitae, consistency matters more than quick results.

My experience has been that slow release fertilizer also supports stronger root development. Since the nutrients are delivered gradually, the plant can absorb what it needs over time without being overwhelmed. That usually leads to better overall growth, deeper green color, and better resistance to stress from heat, drought, or transplanting.

I also like slow release fertilizer because it is easier to manage. I don’t have to apply it as often, and there is less risk of nutrient runoff or fertilizer burn. For me, that makes it a safer and more reliable choice for keeping arborvitae healthy, full, and attractive throughout the season.

My Buying Guides on Slow Release Fertilizer For Arborvitae

Why I Use Slow Release Fertilizer for Arborvitae

When I care for arborvitae, I prefer slow release fertilizer because it feeds the plant gradually over time. In my experience, this helps support steady growth without the risk of burning the roots. Arborvitae can be sensitive, so I like a fertilizer that gives consistent nutrition instead of a quick burst.

What I Look for in a Good Fertilizer

I always check the N-P-K ratio first. For arborvitae, I usually look for a balanced formula or one slightly higher in nitrogen to support healthy green growth. I also make sure the product is labeled as slow release, because that tells me the nutrients will be delivered over weeks or months.

The Features I Consider Most

When I buy fertilizer, I pay attention to these points:

  • Slow release formula: I want long-lasting feeding with less frequent application.
  • Balanced nutrients: I look for enough nitrogen, phosphorus, and potassium for overall plant health.
  • Safe for evergreens: I choose products made for shrubs, trees, or evergreen plants.
  • Easy application: I prefer granules because I can spread them evenly around the root zone.
  • Low burn risk: I avoid anything too strong that might damage the plant.

How I Decide the Right Size

I usually choose the package size based on how many arborvitae I have and how often I fertilize. If I only have a few plants, a smaller bag is enough. For larger hedges, I look for a bigger container so I do not run out halfway through the season.

When I Apply It

In my experience, the best time to fertilize arborvitae is in early spring, when new growth begins. Sometimes I apply a second feeding in early summer if the product recommends it. I avoid fertilizing too late in the season because I do not want to encourage tender growth before cold weather.

How I Apply Fertilizer Safely

I always spread the fertilizer around the drip line, not right against the trunk. Then I water it in well so the nutrients start moving into the soil. I also follow the label directions carefully, because using too much can do more harm than good.

My Tips for Choosing the Best Product

Here is what I personally recommend:

  • Read the label and make sure it is suitable for arborvitae or evergreens.
  • Choose a slow release formula for steady feeding.
  • Avoid over-fertilizing, especially with young plants.
  • Pick a product that matches your soil needs if you already know them.
  • Look for reviews that mention healthy green color and strong growth.

My Final Thoughts

From my experience, the best slow release fertilizer for arborvitae is one that feeds gently, lasts a long time, and supports healthy evergreen growth. I always focus on safety, balance, and ease of use. When I choose the right fertilizer and apply it properly, my arborvitae stay greener, fuller, and healthier throughout the season.

Final Thoughts

I’ve found that slow release fertilizer is one of the easiest ways to support healthy, steady arborvitae growth without the risk of overfeeding. My key takeaway is to choose a balanced formula, apply it at the right time, and let it feed the plant gradually over the season. With the right care, arborvitae can stay fuller, greener, and more resilient year after year.

Author Profile

Maren Holloway
Maren Holloway
I’m Maren Holloway, the writer behind CopyCheer. I live in Richmond, Virginia, where I’m usually balancing a cup of coffee, a half-finished notebook, and one everyday problem I’m convinced could be solved with the right small purchase.

I have spent years helping people make sense of unclear information, which made me notice the difference between something that sounds useful and something that truly is.

Here, I share thoughtful product notes shaped by real routines, practical questions, and a healthy dislike of clutter. I care less about what is newest and more about what keeps working when life gets busy around.