Intro

A feed chart is a weekly guide that shows what to feed your plants, when to feed it, and how strong your nutrient solution should be. General Hydroponics feed charts help growers move through each stage of plant growth with a clear feeding plan.

What a feed chart tells you

A GH feed chart usually includes growth week, growth stage, recommended products, dosage rates, EC range, PPM range, target pH, and notes or special instructions.

The chart is not just a product list. It is a staged program that changes as the plant moves from early growth to flowering, ripening, and flush.

Week number and growth stage

The week number shows where you are in the feeding schedule. Use the week as a guide, but also pay attention to plant development because plants do not always follow a perfect calendar.

Common stages include propagation, seedling, vegetative growth, transition, early bloom, mid bloom, late bloom, ripen, and flush.

Product rows and dosage rates

Each product row shows whether a product is included in that week and how much to use. If a product cell is blank, that usually means the product is not used that week.

Dosage rates may appear as mL/gal, tsp/gal, g/gal, g/L, or lb/gal for stock solutions. Always confirm the unit before mixing.

EC, PPM, and pH

EC measures the total dissolved mineral strength of the nutrient solution. A higher EC usually means a stronger solution.

PPM estimates nutrient strength, but meters may use different conversion scales, commonly PPM 500 or PPM 700.

pH tells you how acidic or alkaline the solution is. Adjust pH after nutrients and supplements are mixed into water.

How to use a feed chart step by step

• Choose the correct product line and feed program.

• Select the schedule strength: light, medium, aggressive, standard, or high EC.

• Find the current week or growth stage.

• Add each listed product at the recommended rate.

• Mix products in the correct order.

• Check EC or PPM.

• Check and adjust pH last.

• Feed plants and watch their response.

Common feed chart mistakes

• Using the wrong feed chart for the product line.

• Confusing mL/gal with mL/L.

• Not checking whether your meter uses PPM 500 or PPM 700.

• Mixing concentrates together before dilution.

• Adjusting pH before adding nutrients.

• Starting too aggressive with young or sensitive plants.

Final recommendation

A feed chart gives you a proven starting point. Use it together with your own observations. Healthy plants, stable pH, reasonable EC, and consistent mixing are signs that your feed program is on track.