Grow More All Season's Fertilizer - Water Soluble Plant Fert

The Verdict

Bottom line up front: If you’re tired of paying premium prices for water-soluble fertilizer that’s 90% the same chemistry, Grow More All Season’s delivers the goods at a working-person’s price. For the money, this is the best balanced 20-20-20 I’ve tested this season.

What’s actually in the bag

Grow More sends you a heavy-duty foil pouch — the 2.5-pound size fits neatly on a shelf, unlike the flimsy paper bags Miracle-Gro uses. The product image shows a bright yellow and green bag with the NPK ratio front and center, which is accurate. Inside, you get fine blue-green crystals that dissolve almost instantly in lukewarm water.

The formula is straightforward: 20-20-20 — equal parts nitrogen, phosphorus, and potassium. That’s the “all season” sweet spot. Unlike high-nitrogen lawn foods or bloom-boosting high-phosphorus mixes, this balanced ratio works for virtually everything you’re growing. The bag also lists chelated micronutrients — iron, zinc, manganese, and copper — which most budget fertilizers skip. That matters if you’re growing in containers or alkaline soil where nutrients lock up.

Real-world performance

I’ve run this through three different use cases over the past few months:

Container vegetables: Tomatoes and peppers responded within 5 days — new growth was noticeably darker green than control plants fed a competing brand. Mixing at the recommended 1 tablespoon per gallon, I saw zero leaf burn even on heat-stressed plants in mid-July.

Lawn spot treatment: Diluted at half strength (1/2 tablespoon per gallon), it kicked stubborn patches of clover and crabgrass back without scorching the surrounding grass. The nitrogen release is fast, so you’ll see results quickly, but don’t expect slow-release longevity — you’re feeding every 2-3 weeks, not once a month.

Houseplants: This is where it shines. The chelated micronutrients prevent the yellowing between veins that plagues indoor plants in winter. My monstera and pothos have held steady color through a full cycle.

What buyers consistently say

The 4.7-star rating across 235 reviews holds up. The most common praise centers on value and versatility. One verified buyer put it plainly: “Same results as the big-name brand at half the price. My garden has never looked better.” Another mentioned using it for hydroponics with consistent EC readings, which speaks to the purity of the formula.

Several reviewers specifically mentioned that it doesn’t cake or clump after opening — a real issue with other water-soluble fertilizers that absorb humidity and turn into a brick.

Where it falls short

No scoop. The bag is bare inside. You’re expected to read the small chart on the back and measure with your own spoon. A tablespoon is the standard measure, but if you’re using a different brand’s scoop, don’t assume it matches.

The smell. When first mixed, it has a sharp ammonia note that takes a couple minutes to dissipate. Outdoors, no problem. In a kitchen or enclosed porch, you’ll notice it.

Fast-acting means fast-fading. This is a quick-release fertilizer. If you’re looking for set-and-forget feeding, look at slow-release pellets instead. This requires consistency.

Who should buy this

• Container gardeners who want a single fertilizer for all their pots — this is your one-bag solution
• Budget-conscious growers who know 20-20-20 is 20-20-20 regardless of the label
• Hydroponic growers needing a clean, fully-soluble base nutrient

Skip it if you want slow-release convenience, or if you need a specialized formula (high-bloom, high-root, or acid-loving plant blends).

FAQ

Q: How often should I apply this? A: For outdoor containers and gardens, every 2-3 weeks during active growth. For houseplants, once a month at half strength is plenty. Always water the soil, not the foliage, to avoid burn.

Q: Can I use this on seedlings? A: Yes, but dilute it to quarter strength (1/4 tablespoon per gallon) until the second set of true leaves appears. The full-strength dose is too hot for young roots.

Q: Does it work in a hose-end sprayer? A: Yes, it dissolves fully with no residue. Use the highest dilution setting and run the sprayer for 5 seconds to clear the line before stopping.

The Verdict

Buy it if you want professional-grade, balanced nutrition without the brand markup. It’s versatile enough for everything from a 50-plant vegetable garden to a single fiddle-leaf fig.

Skip it if you prefer granular slow-release formulas for low-maintenance feeding, or if you’re sensitive to fertilizer smell during mixing.

Rating: 4.6/5 — Half a star docked for the missing scoop and the pungent mixing odor. Otherwise, it’s the best value in water-soluble fertilizer I’ve found this year.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.