🌿 Water Soluble Fertilizer Calculator
Calculate exact mixing rates, total fertilizer needed & application volumes for any area or container
| Crop / Plant Type | Recommended Formula | oz per gallon | g per Liter | Frequency |
|---|---|---|---|---|
| Vegetables (tomatoes, peppers) | 20-20-20 | 1.0 oz | 7.5 g | Every 2 weeks |
| Flowering annuals | 15-30-15 | 0.75 oz | 5.6 g | Every 2 weeks |
| Lawn / Turf grass | 28-3-3 | 1.5 oz | 11.2 g | Monthly |
| Fruit trees & berries | 12-12-17 | 1.0 oz | 7.5 g | Every 3 weeks |
| Hydroponics / NFT | 13-2-13 | 2.0 oz | 15.0 g | Continuous |
| Seedlings / transplants | 20-20-20 | 0.25 oz | 1.9 g | Weekly |
| Foliage / houseplants | 15-30-15 | 0.5 oz | 3.75 g | Every 2 weeks |
| Greenhouse crops | 18-18-21 | 1.25 oz | 9.4 g | Weekly |
| Bulb plants | 10-52-10 | 0.5 oz | 3.75 g | Monthly |
| Area (sq ft) | Area (m²) | Water Needed (gal) | Water Needed (L) | Fertilizer @ 1 oz/gal (oz) | Fertilizer @ 1 oz/gal (g) |
|---|---|---|---|---|---|
| 50 sq ft | 4.6 m² | 3.9 gal | 14.8 L | 3.9 oz | 110 g |
| 100 sq ft | 9.3 m² | 7.8 gal | 29.5 L | 7.8 oz | 221 g |
| 250 sq ft | 23.2 m² | 19.5 gal | 73.8 L | 19.5 oz | 553 g |
| 500 sq ft | 46.5 m² | 39.1 gal | 147.9 L | 39.1 oz | 1,109 g |
| 1,000 sq ft | 92.9 m² | 78.1 gal | 295.7 L | 78.1 oz | 2,215 g |
| 2,500 sq ft | 232.3 m² | 195.3 gal | 739.3 L | 195.3 oz | 5,537 g |
| 5,000 sq ft | 464.5 m² | 390.6 gal | 1,478.7 L | 390.6 oz | 11,074 g |
| Package Size | Weight (oz / g) | Gallons Mixed (1 oz/gal) | Area Covered (sq ft) | Area Covered (m²) |
|---|---|---|---|---|
| Small pouch | 8 oz / 227 g | 8 gal | ~1,024 sq ft | ~95 m² |
| Standard bag | 1 lb / 454 g | 16 gal | ~2,048 sq ft | ~190 m² |
| Medium bag | 2 lb / 907 g | 32 gal | ~4,096 sq ft | ~381 m² |
| Large bag | 5 lb / 2.27 kg | 80 gal | ~10,240 sq ft | ~951 m² |
| Bulk bag | 25 lb / 11.3 kg | 400 gal | ~51,200 sq ft | ~4,756 m² |
| Pro pail | 50 lb / 22.7 kg | 800 gal | ~102,400 sq ft | ~9,512 m² |
| Project | Area (sq ft) | Water Needed (gal) | Fertilizer (oz) @ 1 oz/gal | Package Size Needed |
|---|---|---|---|---|
| Raised bed 4x8 | 32 sq ft | 2.5 gal | 2.5 oz | Small pouch |
| Flower bed 10x15 | 150 sq ft | 11.7 gal | 11.7 oz | Standard bag |
| Vegetable garden 20x20 | 400 sq ft | 31.3 gal | 31.3 oz | 2 lb bag |
| Small lawn 30x30 | 900 sq ft | 70.3 gal | 70.3 oz | 2x 2 lb bags |
| Greenhouse 12x24 | 288 sq ft | 22.5 gal | 22.5 oz | 2 lb bag |
| Large lawn 100x50 | 5,000 sq ft | 390.6 gal | 390.6 oz | 25 lb bag |
Water Soluble Fertilizer mixes with pure water then one puts them on the leaves of plants for fast taking in of nutrients, or one uses them to flood the soil, so that plants take the nutrients through their roots. Because they fully dissolve in water, the nutrients become right away usable. Unlike granular or slow release fertilizers, Water Soluble Fertilizer gives nutrients already dissolved so plants can use them without waiting.
Plants receive nitrogen, phosphorus, potassium and other needed elements through their roots. Even so those basic elements only become available after the soil is well watered or receives plenty of rain to soak it. Because roots only take dissolved nutrients, any fertilizer or compost does not help the plant until its nutrients dissolve in the small water space around the soil particles.
How Water Soluble Fertilizer Works
Here is the main reason that Water Soluble Fertilizer works so well.
Water Soluble Fertilizer is based on three main nutrients for plants: nitrogen, phosphorus and potassium. They guarantee precise mix of nutrients and equal spread. Some products include small nutrients for more efficient delivery of nutrition.
For instance, famous is the balanced 20-20-20 formula. Professional 20-20-20 fertilizer comes in a bag of 25 pounds and quickly gives green color and leaf growth. There are also special mixes, like single potassium phosphate fertlizer with 52% phosphorus and 34% potassium, which well helps during flowering, fruiting and general quality improvement.
Water Soluble Fertilizer works just like the granular kind. The only difference lies in the way of delivery. The main benefit is that nutrients become right away available for plants, which commonly is really wanted.
They work well for drip feeding, leaf nutrition and water-based solutions. Water Soluble Fertilizer serves well as a food source for growing home water-based crops. Such products are made up of high quality, technical grade mixes of fertilizers.
Even so organic fertilizers with carbon do not work for water-based growing. Pure mineral salts that fully dissolve in water usually do not count as organic.
Water Soluble Fertilizer is meant too care about the whole landscape, giving strong growth, nice color and resistance against diseases and insects. One can use it for home or outdoor flowers, vegetables or trees. The usual method is to dissolve one tablespoon in a gallon of water for plants, applying it twice a month or even less often.
Some mixes need only two pounds with 25 gallons of water to cover a big surface.
Such fertilizers are fast and short-lived, dissolving easily for efficient nutrition cycles. All nitrogen-based fertilizers dissolve in water, including urea and calcium ammonium nitrate. Water Soluble Fertilizer does not always mean water-based use however.
Binding agents help to bind nutrients with water specifically. One must care about management, to escape nutrient loss because of toomuch rain or watering, and too much fertilizing can cause salt buildup in the soil.
