The Complete Guide to Seachem Flourish Plant Products

Seachem's Flourish line is one of the most complete plant-supplement systems available, and it can feel overwhelming when you first see a shelf full of nearly identical bottles. This guide breaks down what each Seachem Flourish product actually does, when you need it, and how the pieces fit together so you can build a fertilizing routine that matches your tank. Everything mentioned here is stocked in our Seachem collection.

Where to start: Flourish Comprehensive

If you only buy one product, make it Seachem Flourish Comprehensive. It's an all-in-one supplement that provides trace elements, vitamins, amino acids, and other micronutrients most plants need. For low-tech and low-to-moderate light tanks, Comprehensive alone is often enough to keep undemanding plants like Anubias, Java fern, and crypts healthy.

Carbon: Flourish Excel

Seachem Flourish Excel is a liquid source of bioavailable organic carbon. Plants use carbon as a building block, and in tanks without pressurized CO2 injection, Excel can noticeably improve growth and coloration. It also helps suppress some algae. Dose carefully and follow label directions, since overdosing can harm sensitive species like Vallisneria and some mosses. If you want the full picture on carbon, see our guide on whether aquarium plants need CO2.

Root feeding: Flourish Tabs

Seachem Flourish Tabs are gravel-bed tablets that deliver nutrients directly to the roots. They're ideal for heavy root-feeders like Amazon swords, crypts, and other rosette plants. Push a tab into the substrate near the plant's root zone and replace roughly every few months.

The individual macro and micro supplements

For higher-light or heavily planted tanks, the all-in-one may not supply enough of every nutrient. That's where the targeted bottles come in, letting you dose exactly what your plants are short on:

• Flourish Nitrogen — a nitrogen source (a key macronutrient) for tanks with a light bioload or fast-growing stem plants.
• Flourish Phosphorus — supplies phosphorus, another macronutrient; deficiency often shows as stunted growth.
• Flourish Potassium — potassium is frequently the first nutrient to run low; pinholes in leaves are a classic sign.
• Flourish Iron — supports lush green and red coloration; red plants in particular benefit from extra iron.
• Flourish Trace — replenishes trace elements that are used up between water changes.

Flourish Advance

Seachem Flourish Advance is a growth enhancer that promotes root development and can help plants establish faster, making it a useful addition when setting up a new planted tank.

Planting aids: Flourish Glue

Seachem Flourish Glue is a cyanoacrylate gel for attaching plants like Anubias, Bucephalandra, and mosses to wood and rock. It sets quickly, even underwater, and is handy for aquascaping without burying rhizomes in the substrate.

Building a simple routine

A practical starting point for most planted community tanks: dose Comprehensive one or two times per week, add Excel on the days between if you want extra carbon, and use root tabs for heavy feeders. As your tank matures and demand increases, introduce the individual macros and iron based on what your plants are telling you. For a full walkthrough of dosing, see our guide on how to fertilize aquarium plants.

Reading your plants

Nutrient deficiencies show up in the leaves. Yellowing older leaves often points to nitrogen or magnesium; pinholes and ragged edges suggest potassium; pale new growth can indicate iron. Adjust one variable at a time and give plants a couple of weeks to respond before changing your dosing again.

Ready to stock your fertilizer shelf? Browse the full Seachem collection and our live aquarium plants, and pair your new routine with a solid aquascaping setup.