Search  for anything...
The Grow Co

Ammonium Sulfate 21-0-0 Fertilizer, High Nitrogen Fertilizer for Plants Rapid Growth & Deep Green Color, Ideal Ammonium Sulfate Fertilizer & Soil Acidifier to Lower pH Levels in Alkaline Soil, 5 lb.

    • Based on 52 reviews
Condition: New
Checking for product changes
$17.47 Why this price?

Buy Now, Pay Later

As low as $4 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Nov 11
Order within 23 hours and 33 minutes
Available payment plans shown during checkout

Features

  • NITROGEN NUTRIENT PLANT FOOD: Unlike other garden & lawn fertilizers, our ammonia sulfate fertilizer has a 21-0-0 ratio with 21% nitrogen and 24% sulfur for improved soil health & greener growth.
  • GREAT FERTILIZER SOIL ACIDIFIER: Made to quickly acidify soil, our sulfur for soil is excellent for acid loving plants. It lowers pH levels & is perfect for fertilizing plants in highly alkaline soil.
  • VIBRANT, GREENER COLOR: Our ammonium sulfate fertilizer helps you achieve healthy, deep green plants. Watch your plants & turf bursting with lush greenery, creating stunning gardens & green lawns.
  • BIGGER BLOOMS & YIELD: Our ammonia sulfate promotes lush growth & colorful blooms. It grows more fruit & vegetables & works great as a sulfur & nitrogen tree fertilizer for hydrangea, azaleas & more.
  • PREMIUM PLANT FERTILIZER: This versatile & highly soluble formula is derived from premium Ammonium Sulfate. It instantly creates a welcoming environment for plants that thrive in acidic conditions.
  • EASY TO USE: For a beautiful turf, spread 4 lbs. for every 1,000 sq. ft. For garden, flowers & shrubs, use 2.5 cups for 100 sq. ft. For trees' rapid growth, use 1 cup per inch of tree trunk diameter.

Brand: The Grow Co


Item Weight: 4 Pounds


Item Form: Granules


Specific Uses For Product: Plant Growth, Soil Conditioning


Target Species: Insects


Package Dimensions ‏ : ‎ 11.65 x 7.28 x 3.11 inches; 4 Pounds


Date First Available ‏ : ‎ January 1, 2024


Manufacturer ‏ : ‎ The Grow Co.


Country of Origin ‏ : ‎ USA


Best Sellers Rank: #18,457 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #612 in Garden Fertilizers


#612 in Garden Fertilizers:


Customer Reviews: 4.6 4.6 out of 5 stars 52 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great item
When you use this, make sure you water your grass first then put this on and then water real good again after you apply it to your lawn it takes a few days for it to work. You just need to keep it watered or your grass will burn out. I feel it’s a little bit overpriced for the amount that you receive, but the results are amazing in the end. ... show more
Reviewed in the United States on July 27, 2024 by brooks garcia
    • Study the product and use as needed
Follow rules of use or it could cause problems. Read and follow bag instructions. Works great then!
Reviewed in the United States on August 2, 2024 by Rob
    • So far it works great
So far it's working great The places that I wanted it to fill in and starting to feel in Thank you
Reviewed in the United States on July 25, 2024 by valerie m.
    • fertilizer
This high nitrogen (21-0-0) fertilizer is easy to spread, and works well
Reviewed in the United States on June 25, 2024 by john hinton
    • Revitalized my tomatoes
My tomatoes were struggling and I ran some pH strips tests on them and after waiting for results, decided to go in with some nitrogen fertilizer and it did the trick. Highly recommended. A little goes a LONG way.
Reviewed in the United States on June 13, 2024 by Yari
    • Works good
This product worked great
Reviewed in the United States on June 22, 2024 by Kindle Customer
    • use it sparingly
nothing
Reviewed in the United States on June 1, 2024 by Michael Durant
    • Great to use on Southwest lawns.
Review Image by Tim D Tim D
Review Image by Tim D Tim D
Review Image by Tim D Tim D
Guess this is a good time to explain the use of this product and where I would not use it. So this is a ammonium Nitrogen at 21% so fairly high Nitrogen content. That's a pound on Nitrogen per 1000 sq ft. The other ingredient is Sulfur at 24% so 1.2 pounds per 1000 sq ft. When you look at fertilizers, they have a NPK %. N ( Nitrogen) P (Phosphate) and K (Potassium). Nitrogen is for plant growth. P and K is for root development, plant health, flowering and fruit development. I won't go into all the details but concentrate on this product. So from all the soil test I've seen in the southwest, we have sand, clay and loom. The test also shows the PH level and nutrient levels. PH is usually around 7.8-8, slightly alkaline. Ideal PH for grass and most plants is 6.5-7. Another common trend in the nutrient needs is Nitrogen. I've found the P and K to be mixed, depending on town. When we have alkaline soils, we can never change the PH forever and that's a shame because plants/grass take up nutrients much better in neutral soils. But the addition of Sulfur will lower the PH level allowing plants/grass to uptake more nutrients while the PH is lower. After 3-5 weeks the PH will return to it's natural level ( when soil is more acidic, lower than 6, it's easier to raise the PH with lime). So this product has a nice amount of sulfur to temporarily lower PH level and allow plants/grass to take in more nutrients. It also has ammonium for nitrogen. Fertilizers get nitrogen from ammonium or urea as the majority of ingredient for nitrogen. Urea is used more but I like ammonium better. So with all said, I love this product for lawns in the southwest that will greatly benefit from the nitrogen and sulfur. That being said, sulfur is expensive so having a bag of 24% sulfur and 21% nitrogen to treat 1000 sq ft at this cost is good. I want my lawn looking it's best and I'll be using this product a couple times a season. The other times I fertilize I'll use a NPK product without the sulfur for cost. I just did my first application as my Bermuda grass is mostly out of dormancy and ready to thrive. It's best to wait till 80-90% of grass is green and growing before hitting it with a high nitrogen fertilizer. As for use with my Blueberry bush, even though it will help lower the PH as Blueberries and other plants like an acid soil, I will instead use an acidifier to lower PH and use a separate fertilizer providing the right combination of NPK to match the needs of the plant for that given time. 21% nitrogen is high and if too much is used, burning of the plant can result and too little may not get the PH to ideal levels, I'm very close to having my grass fully green and growing crazy, this ammonium sulfate will get it there quickly as temps are now mid 80's. I have a few products from the Grow Co and love them all. Great product at a good price. ... show more
Reviewed in the United States on April 18, 2024 by Tim D Tim D

Can't find a product?

Find it on Amazon first, then paste the link below.