SKU: 62926985728

Sustane® 50 lb. 8-2-4 Medium Grade All Natural Fertilizer

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Description

Sustane® 50 lb. 8-2-4 Medium Grade All Natural FertilizerApply Sustne 8 2 4 granulated fertilizer whenever you're looking for a natural, budget friendly way to kick start lawns and gardens. The 8 2 4 (4 1 2) NPK ratio is an excellent base for spring turfgrass fertilization and is also beneficial for the establishment or reestablishment of vegetation and bedding plants. With a slow release formula that includes organic humus to provide dense, balanced macro and micronutrients, Sustne fertilizer will feed

Apply Suståne® 8-2-4 granulated fertilizer whenever you're looking for a natural, budget-friendly way to kick-start lawns and gardens. The 8-2-4 (4-1-2) NPK ratio is an excellent base for spring turfgrass fertilization and is also beneficial for the establishment or reestablishment of vegetation and bedding plants. With a slow-release formula that includes organic humus to provide dense, balanced macro- and micronutrients, Suståne fertilizer will feed crops for at least 45 days and can sustain its release for up to 12 weeks. It also improves soil stability and adds resistance to pathogens, arid environments and pH changes.

Greenhouse Megastore has 50-pound bags of Suståne 8-2-4 fertilizer for large home lawns and gardens as well as commercial landscaping. It's OMRI-listed as 100% organic for in-ground soil, potting mixes or general maintenance and has already been fully composted so you don't need to sterilize it before application.

Recommended Use:

For use in the production of certified organic gardens, turfgrass and landscape maintenance, greenhouse bedding plants and annual establishment, erosion control, native reestablishment and soil reclamation and remediation.

Benefits:

  • Rich in humic acids
  • Medium Grade: 200 SGN (2.8-1.4 mm)
  • Increases the nutrient and water-holding capacity of the soil.
  • Strengthens a plant's tolerance against hot dry conditions.
  • Promotes greater root development.
  • Improves buffering against changes in soil pH.
  • Increases the soil's ability to suppress plant pathogens.
  • Increases soil porosity and stability for greater root development and water-holding capacity.
  • Always safe for plants, people, pollinators and the environment.
  • Manufactured by Suståne in the U.S. at an EPA-permitted facility.
  • Pathogen and weed-free, no blood or bone products. Allowed for export to over 60 countries worldwide.
  • Aerobic composting eliminates animal and rodent attraction to the application site.
  • Contains naturally occurring beneficial bacteria and fungi that are necessary to begin the nutrient life cycle in poor soil.
  • Suståne is fully composted, eliminating the need for sterilization and permitting a healthy environment for beneficial microbial populations.

Guaranteed Analysis:

Total Nitrogen (N) 8.0%
Ammoniacal Nitrogen 0.40%
Water Soluble Organic Nitrogen 0.40%
Water Insoluble Organic Nitrogen* 7.20%
Available Phosphate (P2O5) 2.0%
Soluble Potash (K2O) 4.0%
Calcium (Ca) 2.0%

Total Plant Nutrition:

Iron 0.50%
Manganese 0.05%
Zinc 0.05%
Humic Acid 6.00%
Organic Matter 65.0%
pH 6.8
Carbon : Nitrogen (C:N) 4:1
Bulk Density lb./cu. ft. 38
% of Total N as Slow-Release 90.0%

Derived from aerobically composted turkey litter, feather meal, and sulfate of potash.
*7.2% slowly available nitrogen from aerobically composted turkey litter and feather meal.

Suståne's Integrated Soil Management Program:

Turf Establishment, Seeding, New Lawn Construction, Laying Sod and Sprigging:
Suståne® 8-2-4 is a complete package fertilizer containing slow-release nitrogen, chelated micronutrients, organic phosphorous and humic substances. It has been demonstrated time and again to surpass synthetic turf starter fertilizers and other sources of humates and plant bio stimulants.

Turfgrass & Landscape Maintenance:
Professional landscapers have increasingly turned to Suståne® 8-2-4 for use on high maintenance turf and landscaped environments. While synthetic fertilizers supply plant growth nutrients, they do not supply the organic matter required to maintain quality growth. Using fully composted natural fertilizers increases the levels of beneficial microbial activity, which in turn converts nutrients into plant-available forms.

Incorporating into Potting Soil Mixes and other Container Substrates:
Sustane® 8-2-4 provides a constant release of nutrients when used with container substrates with an average temperature of 70oF / 21oC. When determining application rates consider all cultural practices including irrigation, container substrate physical characteristics, and growing environment.

Soil Preparation:
Light, High Sandy Soil: 10 lb. per 100 square feet of bed
Medium, Clay Loam Soil: 7.5 lb. per 100 square feet of bed
Heavy, Silty, Clay Loam: 5 lb. per 100 square feet of bed

Hydroseeding:
Mix with water solution at a ratio of 4 lb. Suståne® 8-2-4 to 1 gallon of water or 2 tons per 1,000-gallon tank).


Additional Information

Spec Sheet (PDF)
OMRI Listed Certification (PDF)
General Guidelines (PDF)
Registered Material Certification (PDF)
Safety Data Sheet (PDF)

Shipping Notes
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SKU: 62926985728

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Marilyn solano
Massapequa, US
★★★★★ 5
Interesting
Format: Paperback
Product with very good quality, its description matches the website.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
D
Verified Purchase
Daniel Rosehill
Natrona Heights, US
★★★★★ 5
A wonderful primer for those discovering the amazing world of generative AI
Format: Paperback, Format: Paperback
Somewhere in the past year, ChatGPT has gone from "cool, interesting, amusing" to a massively valuable work assistant capable of writing Python scripts, analysing data, and doing lots, lots, more. The key to this? The rapid evolution of OpenAI's GPT models and making my first forays into prompt engineering. If I thought I was getting good, though, this book took me reminded me that I'm just scratching the surface. Halfway through the first chapter I was already furiously scribbling notes in the margins for what I could do better with my prompt writing and by the end of the text I felt like I had gotten a very good grounding - not just in GPTs specifically but in the bigger picture of how these hugely powerful tools were trained and came to maturity. I imagine that few will argue with my assertion that there is lots of hyperbole and "noise" in the AI space right now which, as ever, makes it hard to pick out the signal from the noise. Which is precisely why I sought out an O'Reilly title and I'm very glad that I did. Thorough, excellent, and I hope that this edition will be the first of many. As this rapidly maturing field scales and matures I think that prompt engineering will be an essential discipline to master. Pick up this text to get a good foothold on things.
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Reviewed in the United States on August 3, 2024
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Verified Purchase
Scott J. Pearson
Waukegan, US
★★★★★ 4
Understanding AI prompts as a science
Format: Audiobook
Prompt engineering is the art and science of finding the right words to generate the right responses from artificial intelligence (AI). It's becoming a skill in-demand in today's workplaces. It's also becoming an essential skill for life. To understand prompt engineering, you must understand how AI tools understand their inputs. This book explains that to you in many forms. It covers prompting as it intersects all the major AI disciplines, like general prompts (as in a ChatBot), fine-tuning, and retrieval-augmented generation (RAG). It also introduces how prompting intersects a couple of image-generation tools. As a scientist, I appreciate the theoretical approach to these practical matters. Too many people are hacks at AI these days, and any technical understanding can rapidly advance an individual's effectiveness. Prompt engineering is often made fun of as a "soft" topic, but as this book demonstrates, it intersects all the major AI areas. Presumably less garbage in means less garbage out. This book shows how you can make that take place. As typical for O'Reilly materials, this book appeals to people who desire an intermediate-to-advanced understanding of how AI works. It's not for the casual user. Anyone technical involved in professional knowledge generation using AI can benefit from understanding the dynamics "under the hood." It's a good, though perhaps not ground-breaking, textbook for those of us unable to take a class in the subject. Prompt engineering may be a soft topic to many, but books like this ground the field in the science that can make or break a digital or software product.
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Reviewed in the United States on December 13, 2025
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Jason Bolton
Chelsea, US
★★★★★ 5
Great book
Format: Paperback
Great book! It is helpful as I work towards my Masters of Science in Applied Artificial Intelligence
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Reviewed in the United States on December 20, 2025
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James Gianoglio
Lexington, US
★★★★★ 5
Comprehensive Guide with Practical Insights
Format: Paperback
This is a solid book for understanding the art and science of working with LLMs and other generative AI models. I always struggled with getting the output I was looking for, and wasn't sure how best to "ask" the models for what I wanted. This book did a great job of laying out the strategies and practical guidance to craft the prompts. There were a lot of tips and tricks, but the overall understanding and framework around prompt engineering has been super useful.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 25, 2024

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