--- product_id: 14730147 title: "MSU Orchid Fertilizer 13-3-15 Reverse Osmosis, Rain, Tap (City) Water Formula 2 Pounds" brand: "jim's orchid supplies" price: "240.31 DT" currency: TND in_stock: true reviews_count: 8 category: "Jim's Orchid Supplies" url: https://www.desertcart.tn/products/14730147-msu-orchid-fertilizer-13-3-15-reverse-osmosis-rain-tap store_origin: TN region: Tunisia --- # Complete macro & micronutrient blend Instantly water soluble pellets 13-3-15 NPK precision formula MSU Orchid Fertilizer 13-3-15 Reverse Osmosis, Rain, Tap (City) Water Formula 2 Pounds **Brand:** jim's orchid supplies **Price:** 240.31 DT **Availability:** ✅ In Stock ## Summary > 🌸 Feed your orchids like a pro, bloom like a boss! ## Quick Answers - **What is this?** MSU Orchid Fertilizer 13-3-15 Reverse Osmosis, Rain, Tap (City) Water Formula 2 Pounds by jim's orchid supplies - **How much does it cost?** 240.31 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/14730147-msu-orchid-fertilizer-13-3-15-reverse-osmosis-rain-tap) ## Best For - jim's orchid supplies enthusiasts ## Why This Product - Trusted jim's orchid supplies brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Mixing:** Tiny pellets dissolve instantly in any water type—RO, rain, or tap - • **Humidity-Resilient:** Moisture magnet pellets liquefy but stay fully effective—no waste, no worries - • **Long-lasting Supply:** 2 pounds equals 100+ teaspoons—feeds your orchids for seasons - • **Balanced Growth Boost:** Includes essential calcium, magnesium, and trace minerals for lush blooms - • **Tailored Orchid Nutrition:** MSU-developed 13-3-15 formula optimized for orchid vitality ## Overview MSU Orchid Fertilizer 13-3-15 is a scientifically formulated, water-soluble nutrient blend designed specifically for orchids. Developed by Michigan State University, it delivers a precise balance of nitrogen, phosphate, potassium, calcium, magnesium, and essential micronutrients. The 2-pound pack provides over 100 teaspoons of fertilizer, dissolving instantly in reverse osmosis, rain, or tap water. Despite its moisture-attracting nature, the fertilizer remains effective even if it liquefies in the bag, ensuring long-lasting, hassle-free orchid care. ## Description Guaranteed Analysis Macronutrients: 13.0% Total Nitrogen (Nitrate Nitrogen 12.5%, Ammoniacal Nitrogen 0.7%) 3% Available Phosphate Acid (P2O5) 15.9% Soluble Potash (K2O) 8.0% Calcium (Ca) 2% Magnesium (Mg) Derived from calcium nitrate, magnesium nitrate, potassium nitrate and monopotassium phosphate Micronutrients: 0.177% Iron (Fe) 0.088% Manganese (Mn) 0.044% Zinc (Zn) 0.044% Copper (Cu) 0.018% Boron (B) 0.018% Molybdenum (Mo) Derived from Iron EDTA, manganese sulfate, zinc sulfate, copper sulfate, boric acid, ammonium molybdate GreenCare started a revolution in the fertilizer industry when it introduced its blends incorporating calcium, magnesium and complete minor elements. Tinny pellets with fine powder. Color from off whitish/brown to whitish/blue/green. Instantly water soluble, even in cold water. All information comes from the manufacturer. If any the manufacturer would be solely responsible for any warranties implied or not. Granular fertilizers can start to liquefy in the bag due to contact with moisture/humidity. This will vary depending on humidity and how often the container is opened. This does not mean the fertilizer has gone bad. You can still use in liquefied state. Review: Years of excellent nutes in one bag! - Honestly, I didn't even put a dent in this bag for my last grow. Used 1 tsp per gallon with 1 tsp Epson salt to make up for the lack of sulfur in 13-3-15. Flower, I continued to use it with 0-10-25 incredible bulk, not exceeding 1000 ppm using distilled water (water softening system installed). Around week 6, discontinued 13-3-15 and increased incredible bulk all the way to the end. These nutes work FANTASTIC and will last me at least 3 or 4 years. Most people make surf juice with this (mixed with water in a concentrated form), but I use it straight from the bag. It is dissolveable, but I use a long stuck to stir the mixture to make the larger particles dissolve. I'm saving a whole lot of money on nutes and getting top results. This was my first grow. Looking forward to many more with this nutrient mix. Review: Good Product - Good product. I've been using it for years. Highly recommend. Follow the instructions and your orchids will do very well. ## Features - MSU ORCHID Fertilizer 13-3-15 Reverse Osmosis, rain, tap (City) water formula 2 pounds - Formulated specifically for orchids by Michigan State University (MSU) - 2 pounds = 100 + teaspoons. Mix at 1/2 to 1 Teaspoon per gallon of water. - Tinny pellets with fine powder. Color from off whitish/brown to whitish/blue/green. - Water soluble fertilizer. Must be mixed with water. One downside to MSU is it is a moisture magnet. this can effect color some. Granular fertilizers can start to liquefy in the bag due to contact with moisture/humidity. This will vary depending on humidity and how often the container is opened. This does not mean the fertilizer has gone bad. You can still use in liquefied state. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00J1BGB0W | | Best Sellers Rank | #145,870 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,577 in Garden Fertilizers | | Brand | Jim's Orchid Supplies | | Brand Name | Jim's Orchid Supplies | | Coverage | Medium | | Customer Reviews | 4.5 out of 5 stars 139 Reviews | | Item Form | Granules, Powder | | Item Weight | 2 Pounds | | Manufacturer | GREENCARE Fertilizers, INC | | Mixing Ratio | 1/2 to 1 tsp/gallon | | Model Number | MSURO2 | | Number of Items | 1 | | Part Number | MSURO2 | | Target Species | Orchid | | Unit Count | 32 Ounce | ## Product Details - **Brand:** Jim's Orchid Supplies - **Item Form:** Granules, Powder - **Item Weight:** 2 Pounds - **Manufacturer:** GREENCARE Fertilizers, INC - **Number of Items:** 1 ## Images ![MSU Orchid Fertilizer 13-3-15 Reverse Osmosis, Rain, Tap (City) Water Formula 2 Pounds - Image 1](https://m.media-amazon.com/images/I/71vjbgzlC7L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Years of excellent nutes in one bag! *by M***E on September 16, 2022* Honestly, I didn't even put a dent in this bag for my last grow. Used 1 tsp per gallon with 1 tsp Epson salt to make up for the lack of sulfur in 13-3-15. Flower, I continued to use it with 0-10-25 incredible bulk, not exceeding 1000 ppm using distilled water (water softening system installed). Around week 6, discontinued 13-3-15 and increased incredible bulk all the way to the end. These nutes work FANTASTIC and will last me at least 3 or 4 years. Most people make surf juice with this (mixed with water in a concentrated form), but I use it straight from the bag. It is dissolveable, but I use a long stuck to stir the mixture to make the larger particles dissolve. I'm saving a whole lot of money on nutes and getting top results. This was my first grow. Looking forward to many more with this nutrient mix. ### ⭐⭐⭐⭐⭐ Good Product *by S***H on June 24, 2025* Good product. I've been using it for years. Highly recommend. Follow the instructions and your orchids will do very well. ### ⭐⭐⭐⭐⭐ Great fertilizer, a bit expensive *by C***N on July 1, 2020* I think my African violets appreciate this new fertilizer. They have been getting way too much phosphorus in the previous African violet fertilizer and it's poisoned the mix. I like the lower relative proportion of phosphorous in this mix. Nitrogen and Potash both can leach out of the soil if there is an excess, but phosphorous doesn't move through the soil as easily. my only complaint is I think it's a bit expensive, but quality products usually are more expensive. I recommend this for violets and orchids, both of which hate urea as a nitrogen source. ## Frequently Bought Together - MSU Orchid Fertilizer 13-3-15 Reverse Osmosis, Rain, Tap Water Formula 2 Pounds - Botanicare Cal-Mag Plus, A Calcium, Magnesium, And Iron Plant Supplement, Corrects Common Plant Deficiencies, Add To Water Or Use As A Spray, 2-0-0 NPK, Quart --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/14730147-msu-orchid-fertilizer-13-3-15-reverse-osmosis-rain-tap](https://www.desertcart.tn/products/14730147-msu-orchid-fertilizer-13-3-15-reverse-osmosis-rain-tap) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-21*