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Liquid Nutrients

Liquid nutrients pour and measure by the milliliter, so a feed program is easy to mix, adjust and repeat from one reservoir to the next. Pick a base line made for your medium, organic for drain-to-waste soil or coco, then add a bloom booster in flower.

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Liquid Nutrients

Liquid Plant Food: Base Feeds, Organic Lines and Bloom Boosters

Liquid nutrients are concentrated plant feeds you measure by the milliliter and dilute into water. This collection holds base lines from Athena, Canna, House & Garden, Advanced Nutrients and General Hydroponics, plus organic feeds and bloom boosters. New to feeding? Read how to choose the right nutrient for your garden....

Liquid nutrients infographic: base feeds by growing medium, organic lines, bloom boosters, and label rates for mixing

These feeds sit under nutrients. Dry formulas for large rooms are on the commercial powder nutrients page.

Types of Liquid Feeds

Base Nutrients

A base feed supplies the full diet, usually in two or three parts. Pick it by medium first. House & Garden makes separate Soil and Cocos formulas. Canna Coco A and B runs one rate, 0.5 fl oz per gallon of each part, through the whole cycle. Synthetic lines suit recirculating hydro.

Organic Feeds

BioBizz, Roots Organics Buddha and Iguana Juice work best in drain-to-waste soil or coco, since particles can clog pumps and drippers. The full range is on the organic liquid nutrients page.

Bloom Boosters and Additives

Bloom boosters are high in phosphorus and potassium and work with almost any base line. House & Garden Bud XL, Big Bud, Hydroplex and Heavy 16 Fire are proven picks. Cal-Mag, silica and carbohydrate sweeteners round out a feed program.

How Growers Mix Liquid Fertilizer

Add each part to the water separately, never concentrate to concentrate. Shake each bottle first and store it away from heat and frost, since salts can settle or crystallize. Start young plants at about a quarter of label strength and build up. Check pH after mixing: 5.5 to 6.5 for hydro, 6.2 to 7.2 for soil.

Frequently Asked Questions

When to use bloom booster?

Only in flower, and timing depends on the product. Canna PK 13/14 runs for about one week near the middle of flower at 15 mL per 10 L. Heavy 16 Fire starts in the last week or two of veg and ramps through bloom. Bud XL goes in from mid bloom at 1 mL per liter.

What is the best bloom booster?

The one that fits your base line and feed schedule. Bud XL, Big Bud, Hydroplex and Heavy 16 Fire all work alongside other brands' base nutrients. Because they carry a lot of phosphorus and potassium, watch for tip burn and stay at or below the label rate.

Is liquid fertilizer better than powder?

Once dissolved, the plant takes up the same elements either way. Liquids pour and measure by the milliliter, which suits small reservoirs, dosers and multi-part lines. Powders suit large rooms that mix big batches. Compare cost per gallon of mixed solution rather than bottle price when deciding.

How much liquid nutrients per gallon?

Follow the label, then adjust to the plant. Canna Coco A and B calls for 0.5 fl oz of each part per gallon, while Canna PK 13/14 calls for 0.2 fl oz. For seedlings and clones, begin at about a quarter of the label rate and raise it as they grow.