--- product_id: 42223037 title: "4-18-38 Complete Combo Kit Fertilizer Bulk (2.5 Pound Kit)" brand: "masterblend" price: "€ 62.11" currency: EUR in_stock: true category: "Master Blend" url: https://www.desertcart.pt/products/42223037-4-18-38-complete-combo-kit-fertilizer-bulk-2-5 store_origin: PT region: Portugal --- # Professional-grade nutrient blend 100% water soluble formula Precise 1:1:0.5 mixing ratio 4-18-38 Complete Combo Kit Fertilizer Bulk (2.5 Pound Kit) **Brand:** masterblend **Price:** € 62.11 **Availability:** ✅ In Stock ## Summary > 🌿 Grow like a pro, feed like a boss! ## Quick Answers - **What is this?** 4-18-38 Complete Combo Kit Fertilizer Bulk (2.5 Pound Kit) by masterblend - **How much does it cost?** € 62.11 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/42223037-4-18-38-complete-combo-kit-fertilizer-bulk-2-5) ## Best For - masterblend enthusiasts ## Why This Product - Trusted masterblend brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Power Pack:** 2.5 lbs kit covers multiple 5-gallon nutrient solutions—grow more, stress less - • **Clear & Convenient:** Transparent packaging ensures you see exactly what you get—no surprises - • **Precision Perfected:** Exact 12g MasterBlend, 12g Calcium Nitrate, 6g Epsom Salt ratio for optimal growth - • **Pro-Approved Formula:** Trusted by global horticulture experts for superior plant performance - • **Effortless Absorption:** 100% water soluble for rapid nutrient uptake and healthier plants ## Overview The MASTERBLEND 4-18-38 Complete Combo Kit is a professional-grade, water-soluble fertilizer blend containing MasterBlend 4-18-38, Calcium Nitrate, and Epsom Salt in a precise 1:1:0.5 ratio. Designed for optimal plant growth, this 2.5-pound kit supplies all essential nutrients for mixing 5-gallon batches of nutrient solution, trusted worldwide by horticulture professionals. ## Description The MasterBlend Combo Kit contains all 3 concentrated components needed. The MasterBlend recipe calls for 12g MasterBlend, 12g Calcium Nitrate, and 6g Epsom Salt to make 5 gallons of nutrient solution, where each component is mixed into the water individually. Available in quanties from 1lb to 62.5 pounds. Packed in clear bags by PowerGrow Systems (authorized MasterBlend distributor). The 2.5 Pound Kit contains: 1LB MasterBlend, 1LB Calcium Nitrate, 0.5LB Epsom Salt. ## Features - MasterBlend 4-18-38 Master Kit (3 Separate Components in correct amounts) - Contains MasterBlend 4-18-38, Calcium Nitrate 15.5-0-0, and Epsom Salt (Magnesium Sulfate) - Used by professionals worldwide for optimum plant growth - 100% Water Soluble for easy plant uptake - Packed by weight in a 1/1/0.5 ratio based off the MasterBlend recipe of 12g MB, 12g, CN, and 6g ES ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B072F2BL9D | | Best Sellers Rank | #11,068 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #366 in Garden Fertilizers | | Brand Name | MasterBlend | | Coverage | Full | | Customer Reviews | 4.7 4.7 out of 5 stars (3,888) | | Item Form | Powder | | Item Weight | 10 Pounds | | Liquid Volume | 5 Liters | | Manufacturer | MasterBlend | | Mixing Ratio | 1:1:0.5 | | Model Number | MASTERBLEND-COMBO_2.5LB-KIT | | Part Number | AACXZSG-119 | | Specific Uses For Product | Plant Growth | | Target Species | Plants | | Unit Count | 1 Count | ## Product Details - **Brand:** MasterBlend - **Item Form:** Powder - **Item Weight:** 10 Pounds - **Liquid Volume:** 5 Liters - **Specific Uses For Product:** Plant Growth ## Images ![4-18-38 Complete Combo Kit Fertilizer Bulk (2.5 Pound Kit) - Image 1](https://m.media-amazon.com/images/I/81IOGyGwDGL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I am planting lettuce using hydroponic, my tank is 70liters , what is the mixture for lettuce for my size of tank** A: The common formula seems to be 10G + 10G + 5G in 5 gallons of water for lettuce. 70 liters = about 18.5 gallons. I'll just make my math 18.5 gallons divided by 5 gallons = 3.7 So it would be 37G + 37G + 18.5G . I imagine most people would say 2G + 2G + 1G per gallon. 70 liters = 18.5 gallons, so once again the answer is 37G of Calcium + 37 of Masterblend + 18.5G of Epsom salt. **Q: How long would the 25 pound kit last for a average hydroponics user? Many years? Any examples from your guy's own experience?** A: Yes for me it will last years I have 2 55 gallon drums with a cucumber and watermelon plant in each. And 10 5 gallon buckets with a mix of cucumbers tomatoes and peppers. 2 plants in each I will not put anything with cucumbers next year they drink too much. And two 7 gallon seed starting tubs. Anyway I could do this for years. On the amount I have and I mixed up 20 or so gallons for other people. **Q: Does this generally tend to raise or lower pH?** A: Lowers the ph . If I use my tap water which is about 8.3 it ends up perfect at 5.6 to 5.9 . If I use rain water which is closer to 7 it ends up a tad too low so I add ph up. **Q: May I use this fertilizer for chili pepper plants growing in the ground?** A: Yes you can. I made a batch of this solution and used it on peppers in the garden and I had the most bountiful harvest of peppers possible. ## Frequently Bought Together - MASTERBLEND 4-18-38 Complete Combo Kit Fertilizer Bulk (2.5 Pound Kit) - Calcium Nitrate 15.5-0-0 Fertilizer Bulk Pricing (25 POUNDS) - Southern Ag Calcium Nitrate - 5 Pound Bag --- ## 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.pt/products/42223037-4-18-38-complete-combo-kit-fertilizer-bulk-2-5](https://www.desertcart.pt/products/42223037-4-18-38-complete-combo-kit-fertilizer-bulk-2-5) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-18*