Fertilizer Type: Granular; NPK Ratio: 6-9-6; Benefits: Works for 6 weeks, 3 in 1 product, treats up to 32 flowers; The Bayer Advanced Rose & Flower Care is the best Flower Fertilizer on the market for Roses, Hibiscus, Irises, & so many more plants. It is a 3 in 1 product that acts as insect control, disease control, and fertilizer.
In fact, on most commercial fertilizers, you're going to see an NPK ratio listed on the bag (e.g., 20-20-20). This tells you exactly how much of each element is in that particular marijuana fertilizer. NPK aren't the only nutrients found in fertilizers, however. There are also micronutrients such as calcium, sulfur, magnesium, and many more.
What are the best NPK numbers for flower fertilizer? The best fertilizers for flowers are all-purpose fertilizers that contain higher amounts of phosphorus. You are looking for fertilizer numbers where the second number on the fertilizer label is higher than the other two.
Miracle-Gro uses soybean meal, feather meal, nitrate of soda, sunflower hull ash, bone meal, phosphate rock, and sulfate of potash to make this fertilizer. It doesn't burn your plants as it slowly releases the formula. Use this fertilizer without dissolving it in the water. Jacks All-Purpose Fertilizer.5. Schultz Plant Food. Schultz Plant Food is a water-soluble fertilizer with a 10-15-10 (NPK) formulation, offering a robust dose of Nitrogen and Potassium, essential for the healthy growth and development of banana trees. This versatile plant food is suitable for both indoor and outdoor plants. ApsmB.