Water Soluble Fertilizer
Support healthy foliage and steady plant growth with a water-soluble fertilizer that mixes quickly and evenly. It is a simple choice for growers who want consistent nutrition without a complicated application routine.
Dissolve it in water as directed and use it as part of your regular feeding schedule.
Why You'll Love It
- Healthy Foliage Dissolves fully in water to support healthy foliage.
- Steady Growth Consistent feeding from a solution you mix as you water.
- Easy to Use Simple mixing rather than measuring granules into soil.
Made by growers
More than a bottle on a shelf.
- Talk to real plant people. The team that mixes the formula answers your email.
- Made in-house, in the USA. Every bottle mixed and filled by us, not a third party.
- We're growers, not resellers. We use this on our own plants before it ships.
- Bundle savings only here. Pair any two TPS formulas — your order ships free.
Water-soluble fertilizer for simple mixing and consistent plant feeding. Dissolves into water to support robust growth, healthy foliage, and regular care without a complicated application routine.
How to Use Water Soluble Fertilizer
| Method | Amount | How Often |
|---|---|---|
| Watering can — plants under 12" | 1 Tbs (15mL) per gallon of water | Feed once weekly through the growing season |
| Watering can — plants over 12" | 2 Tbs (30mL) per gallon of water | Feed once weekly through the growing season |
| Hose end sprayer | Set dial to the above feed rates | Feed once weekly through the growing season |
| Leaf misting (optional) | 1 tsp per quart (32 oz) of water | Spray on leaves every 1-2 weeks |
Mix into your normal watering — no separate feeding routine needed. Because it's fully dissolved, every watering delivers a measured dose to the whole root zone rather than concentrating nutrients wherever granules happened to land.
What's Inside
A 3.6-3-5.1 ratio in fully soluble form. Nitrogen at 3.6% is all nitrate nitrogen — the form roots absorb directly, with no conversion step and low burn risk, which is why the response shows up in days rather than weeks. Potassium leads at 5.1%, supporting stem strength, water regulation under heat and drought, and the sugar movement behind fruit and flowers. Phosphate at 3% feeds roots and flowering. The soluble format is the point: dissolved nutrients reach the entire root zone evenly with each watering, and you control the dose exactly rather than hoping a scattered granule releases at the right time.
Beyond NPK: sea kelp (Ascophyllum nodosum) for natural growth compounds, plus calcium at an unusually high 2.1% and 0.75% magnesium, with iron, manganese, zinc, boron, and copper. Iron and magnesium are the two most plants run short of first — both drive chlorophyll production, and in liquid form they're immediately available, which is why a water-soluble feed corrects yellowing faster than a granular one can.
Made For
Anything you water — vegetables, flowers, houseplants, shrubs, young trees, lawns, and containers — indoors and out, in beds, pots, raised beds, and hanging baskets, wherever you want fast, evenly distributed feeding you can dose precisely.
Problems It Solves
- Plants that need correcting now, not in three weeks
- Granular fertilizer that sits on the surface without dissolving
- Uneven feeding where some plants get more than others
- Containers and pots that need a measured dose rather than scattered granules
FAQs
How often should I use water soluble fertilizer?
Feed once weekly through the growing season, dosing by plant size: 1 Tbs (15mL) per gallon of water for plants under 12", 2 Tbs (30mL) per gallon for taller ones. A hose end sprayer set to those rates covers beds and lawns. Weekly is the norm for soluble feeding, since dissolved nutrients are used or leached faster than slow-release granules.
Is water soluble fertilizer better than granular?
They solve different problems. Soluble feeds work immediately, distribute evenly through the root zone, and let you dose precisely — best for containers, fast correction, and anyone who waters regularly. Granular releases slowly over weeks and suits set-and-forget feeding of established plantings. The tradeoff is frequency: soluble needs reapplying weekly, granular doesn't. Many gardeners use both.
Can I use this on both indoor and outdoor plants?
Yes — the 3.6-3-5.1 balance works across houseplants, vegetables, flowers, and shrubs, with the size-based dosing handling the difference between a small pot and a mature plant. A few specialists do better on dedicated formulas: orchids in bark, succulents in lean mixes, carnivorous plants, and acid-lovers like blueberries and azaleas all have requirements a general feed isn't built around.
Will it burn my plants if I mix it too strong?
Overconcentration burns any fertilizer, and browning leaf tips and edges are the early sign. Two things reduce the risk here: nitrogen is entirely nitrate, the low-burn form, and the label rates are moderate. Measure rather than eyeball, start at the lower rate for seedlings and houseplants, and if you overshoot, water with plain water until it drains freely to flush the excess.
Can I mix a batch and store it for later?
Best practice is to mix what you'll use in a session. Diluted fertilizer sitting in a can for weeks can grow algae, particularly in light, and dissolved minerals can settle or precipitate, so the dose you pour later isn't the dose you mixed. The concentrate itself keeps well — stored cool, dark, and sealed, the label puts useful life at up to two years.
When will I see results?
Faster than any other format. All the nitrogen is nitrate, absorbed directly by roots with no conversion step, so uptake begins with the first watering — expect visibly deeper green within 1-2 weeks, sooner on fast growers and container plants. Structural results like fuller growth, better flowering, and fruit set build over 3-5 weeks of weekly feeding.