--- product_id: 7802070 title: "15-30-15 Houseplant Special Water-Soluble Fertilizer, 8oz" brand: "jack's classic" price: "€ 53.67" currency: EUR in_stock: true category: "Jack's Classic" url: https://www.desertcart.hr/products/7802070-15-30-15-houseplant-special-water-soluble-fertilizer-8oz store_origin: HR region: Croatia --- # 15-30-15 NPK for lush growth Water-soluble powder for max dilution Includes precise measuring spoon 15-30-15 Houseplant Special Water-Soluble Fertilizer, 8oz **Brand:** jack's classic **Price:** € 53.67 **Availability:** ✅ In Stock ## Summary > 🌱 Feed your plants like a pro—vibrant growth, zero guesswork! ## Quick Answers - **What is this?** 15-30-15 Houseplant Special Water-Soluble Fertilizer, 8oz by jack's classic - **How much does it cost?** € 53.67 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/7802070-15-30-15-houseplant-special-water-soluble-fertilizer-8oz) ## Best For - jack's classic enthusiasts ## Why This Product - Trusted jack's classic brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Micronutrient Boost:** Enhanced with essential micronutrients for all-around plant health - • **Burn-Safe Application:** Highest safety factor prevents leaf burn when used as directed - • **Dual Feeding Flexibility:** Use as foliar spray or root drench for targeted nourishment - • **Balanced 15-30-15 Formula:** Optimized nutrient ratio for vibrant foliage and abundant blooms - • **Powdered Concentrate Efficiency:** Mix once, feed multiple gallons—cost-effective and eco-friendly ## Overview Jack's Classic 15-30-15 Houseplant Special is an 8oz water-soluble powder fertilizer designed for vigorous green growth and enhanced flowering. Featuring a balanced NPK ratio and enriched micronutrients, it supports both foliar and root feeding with a convenient measuring spoon included. Trusted for safe, gradual nutrient release and versatile application, it’s a must-have for thriving indoor plants. ## Description Releases nutrients gradually for up to 4 months of vigorous growth. Blended with an enhanced micronutrient package which provides optimal nutrition for strong roots and green foliage. Features the highest safety factor to prevent burning when applied as directed. Free measuring spoon enclosed for easy and precise application. ## Features - 15-30-15 Analysis - Great for keeping houseplants vigorous and green and increasing the quality and quantity of blooms in flowering plants. - Many Ways to Feed - Houseplant Special can be used as a foliar or root feeding product. Great for spraying directly onto leaves, roots, or when used in a continuous feed system. - Water-Soluble Powder – Powdered concentrates go further than liquid fertilizers. Simply mix your measured powder with water and you are ready to feed with multiple gallons of liquid fertilizer! - Included Measuring Spoon – All Jack’s Classic fertilizers come with a convenient spoon to create the right amount of liquid fertilizer for your plants. - Micronutrients - Added micronutrients supply your plant with the nutrition it needs for optimal growth and health. Unlike other fertilizers, additional feeding is not required. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00KSMQM0M | | Application Method | Spray, Mix with water | | Best Sellers Rank | #38,397 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #966 in Garden Fertilizers | | Brand Name | Jack's Classic | | Coverage | Medium | | Customer Reviews | 4.7 4.7 out of 5 stars (815) | | Global Trade Identification Number | 00671341515081 | | Included Components | only product | | Item Form | Powder | | Item Highlight | Powdered, Targeted Micronutrient Package, Promotes Green-up and Increased Blooms, Transplant Solution, Root & Foliar Feeding | | Item Weight | 8 ounces | | Liquid Volume | 0.24 liters | | Manufacturer | JR Peters | | Mixing Ratio | 1 teaspoon per gallon of water | | Model Number | 51508 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 51508 | | Specific Uses For Product | Houseplant Care, Foliar Feeding, Root Feeding, Plant Growth, Flowering Plant Support | | Target Species | Plant | | UPC | 671341515081 | | Unit Count | 1 Count | ## Product Details - **Brand:** Jack's Classic - **Item Form:** Powder - **Item Weight:** 8 ounces - **Liquid Volume:** 0.24 liters - **Specific Uses For Product:** Houseplant Care, Foliar Feeding, Root Feeding, Plant Growth, Flowering Plant Support ## Images ![15-30-15 Houseplant Special Water-Soluble Fertilizer, 8oz - Image 1](https://m.media-amazon.com/images/I/71j1fvHZ3kL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: Can this be used on outdoor plants?** A: Yes it can but it depends on the needs of your plants. They also have a blossom booster and all purpose formula that I use outside. **Q: What’s the difference between “all purpose” and “special”?** A: I would think that all purpose applies to all. And special meaning that it contains superb ingredients **Q: Is there any differences between this jr peters houseplant special 15-30-15 and jr peters all-purpose 20-20-20?** A: 15-30-15 is double the amount of phosphorus. It’s best to check on each plant to find out what fertilizer is suitable. **Q: Should this be refrigerated when storing in a very humid environment?** A: I keep mine under kitchen sink and we love in Florida👍🏻 ## Frequently Bought Together - Jack's Classic 15-30-15 Houseplant Special Water-Soluble Fertilizer with Micronutrients to Green-Up and Increase Blooms in Houseplants, 8oz - Jack's Classic 10-30-20 Blossom Booster Water-Soluble Fertilizer with Micronutrients for Increasing Color and Quantity of Blooms in Flowering Plants, 1.5lbs - Jack's Classic 30-10-10 Orchid Special Water-Soluble Fertilizer with Micronutrients and Extra Nitrogen, Used for Turfs and Ornamental Grasses, 8oz --- ## 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.hr/products/7802070-15-30-15-houseplant-special-water-soluble-fertilizer-8oz](https://www.desertcart.hr/products/7802070-15-30-15-houseplant-special-water-soluble-fertilizer-8oz) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-17*