All Purpose Water Soluble Plant Food 20-20-20 - Bigger, Brighter

In this review of Fertilome All Purpose Water Soluble Plant Food 20-20-20, the bottom line is clear: this is a practical, no-nonsense fertilizer for gardeners who want reliably larger and more vibrant flowers without complicated dosing. The 20-20-20 formulation offers a balanced nutrient mix that suits a wide range of bedding plants and container flowers, and it works both as a soil drench and a foliar spray. For growers who value predictable results, ease of use, and good value in a 12 lb. bag, this fertilizer delivers noticeable improvement in bloom size, color, and overall plant health.

Key Features

• Balanced NPK: The 20-20-20 ratio supplies equal parts nitrogen, phosphate and soluble potash to support green growth, root development and flower production.
• Flower enhancement: Users report larger, more abundant and more vibrant blooms when applied according to label directions.
• Dual application: Designed for both soil drench and foliar feeding, it gives flexibility for routine maintenance or quick nutrient boosts.
• Easy mixing: Simple measured recipes are provided, making it fast to prepare solutions for pots, hanging baskets or garden beds.
• Indoor and outdoor use: Formulated for a variety of settings from patio containers to indoor houseplants that benefit from regular feeding.

Who It's For

Gardeners who grow annual flowers like geraniums, petunias, impatiens, pansies and similar bedding plants will find this product particularly useful; its balanced formula focuses on consistent blooming and healthier foliage. The 12 lb. size also suits hobbyists with multiple containers or small garden beds who want to stock a dependable feed without frequent repurchases.

Those who need a specialty fertilizer targeted to a single crop (for example, tomatoes, orchids or acid-loving plants) or prefer slow-release granules rather than a water-soluble feed should look elsewhere. Also, gardeners who want organic-certified inputs should consider organic alternatives, since this is a conventional soluble formula.

Pros & Cons

Pros

• Balanced 20-20-20 formula encourages both vegetative growth and stronger flowering.
• Versatile use as both soil drench and foliar spray for faster uptake when needed.
• Clear mixing instructions make application straightforward and accessible.
• Good value for gardeners managing many containers or beds due to larger bag size.

Cons

• Some customers noted variability in physical hardness of the product, which can affect how quickly it dissolves.
• Not tailored for specialty crops or organic gardening preferences.

Specifications

Our Verdict

For general-purpose flowering plants, this 20-20-20 water soluble fertilizer is a reliable, cost-effective choice that improves bloom size and color while remaining easy to use. It suits gardeners who want a straightforward feed for containers and beds and offers strong value in a 12 lb. package; those seeking organic or crop-specific formulas should consider other options.

Frequently Asked Questions

Can this be used on indoor plants?
Yes, the product is formulated for both indoor and outdoor use; follow the lower foliar mix rates for houseplants.

How often should I apply it?
Follow label guidance for frequency; many users feed regularly during the growing season, adjusting based on plant response.

Will it help increase flower color intensity?
Customers commonly report more vibrant and abundant blooms when used as directed, so it can enhance color in flowering annuals.