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A General Hydroponics feed chart gives you a week-by-week plan for using a nutrient program. It shows which products to use, how much to add, and how nutrient targets change as your plants move through different stages of growth.
Once you understand a few key parts of the chart—growth stage, application rates, EC, PPM, and pH—it becomes much easier to follow.
A feed chart turns a nutrient program into a practical feeding schedule.
Depending on the program, a General Hydroponics feed chart may show:
The important thing to remember is that a feed chart isn’t simply a list of products. It’s a progression. Products and application rates can change as plants move from early growth through vegetative growth, flowering, ripening, and finish.
Most feed charts organize the growing cycle into weeks, stages, or a combination of both.
The week number gives you a reference point within the schedule, but plants don’t always develop according to an exact calendar. Growing environment, plant variety, lighting, temperature, and other conditions can all influence how quickly a plant develops.
That’s why it’s important to consider both the week number and the actual growth stage of your plants.
Depending on the program, stages may include propagation, seedling, vegetative growth, transition, early bloom, mid bloom, late bloom, ripening, and finish.
Use the schedule as your baseline, but pay attention to what is happening in the crop rather than advancing through the chart simply because another week has passed.
Each week or growth stage identifies the products used at that point in the program and their recommended application rates.
If a product isn’t listed for a particular stage, don’t assume that it should be added anyway. Follow the schedule for the program you’re using.
Pay close attention to the unit of measurement. Depending on the product and program, rates may be expressed as:
Rates are generally expressed relative to a volume of water.
For example, if a chart calls for 5 mL per gallon and you’re preparing 10 gallons of water, you would need 50 mL at that rate.
Always verify both the number and the unit before mixing.
Application rates tell you how much product to add. EC, PPM, and pH help you understand the solution you’ve created.
EC, or electrical conductivity, measures the conductivity of the nutrient solution and provides a useful indication of its overall mineral strength.
As nutrient concentration increases, EC generally increases as well.
If your feed program provides a target EC range, compare your mixed solution with that range rather than assuming that adding the listed amount will always produce exactly the same reading. Your starting water and growing conditions can affect the final measurement.
PPM is another way nutrient strength may be displayed.
PPM meters typically convert an EC measurement using a particular scale. Two common scales are PPM 500 and PPM 700.
That means the same nutrient solution can produce different PPM numbers depending on the scale your meter uses.
Before comparing your meter reading with a feed chart, know which scale you’re using.
If you’re unsure, EC provides a useful common reference because it doesn’t require that PPM conversion.
pH tells you how acidic or alkaline your nutrient solution is.
The appropriate range can depend on the nutrient program and growing system, so use the target provided for your program when one is available.
Generally, check pH after nutrients and supplements have been added to the water and thoroughly mixed. Adjusting the water first can give you a reading that changes significantly once the nutrients are added.
Start with the General Hydroponics nutrient line you’re actually using.
FloraSeries, FloraNova, FloraPro, Maxi Series, and other GH systems have their own feeding approaches. Don’t assume that rates or targets from one program apply to another.
Some GH nutrient systems offer more than one feeding schedule.
Depending on the program, you may encounter options such as Light, Medium, Aggressive, Standard, or High EC.
Choose the schedule appropriate for your nutrient system, growing environment, and plants rather than automatically selecting the strongest option.
Locate the week or growth stage that most closely matches your plants.
Use the week number as a reference, but also consider what you’re seeing in the crop.
Identify every product listed for that week and note its application rate.
Check the unit carefully before measuring anything.
Adjust the chart rate for the amount of water you’re preparing.
If the chart specifies a rate per gallon, multiply that rate by the number of gallons in your reservoir or mixing container.
Start with water and add each nutrient or supplement individually according to the instructions for your program.
Allow products to disperse into the water as directed rather than combining concentrated nutrients together before dilution.
Some GH programs have additional mixing or stock-solution instructions, so check the notes associated with your specific feed program before mixing.
Once the solution is thoroughly mixed, check its strength.
Compare the measurement with the target range provided by your feed program, keeping in mind the PPM scale if you’re using PPM rather than EC.
Measure the pH of the finished nutrient solution and adjust it when necessary to reach the appropriate range for your program and growing system.
A feed chart gives you a consistent baseline, but your plants still provide important information.
Watch plant growth and overall crop response as you follow the program. Establishing a consistent routine makes it much easier to recognize when an adjustment may actually be needed.
A few simple mistakes can make a feeding schedule harder to follow than it needs to be.
Using the wrong chart.
Make sure the feed chart matches the nutrient line and program you’re actually using.
Confusing units.
5 mL per gallon and 5 mL per liter are very different application rates. Always check the unit.
Using the wrong PPM scale.
Know whether your meter reports PPM 500, PPM 700, or EC before comparing its reading with the chart.
Mixing concentrated nutrients together.
Add nutrients to water according to the program’s mixing instructions rather than combining concentrates before dilution.
Adjusting pH too early.
Check the finished nutrient solution after the products have been mixed.
Starting with the strongest schedule.
More nutrients aren’t automatically better. Choose the schedule appropriate for your plants and growing conditions.
Switching between schedules without a reason.
Changing programs or strengths partway through a grow can make it difficult to establish a consistent baseline or understand how your plants are responding.
Treating EC or PPM as a dosage instruction.
Application rates tell you how much product to add. EC and PPM are measurements of the resulting nutrient solution. Use both pieces of information together.
A General Hydroponics feed chart gives you a structured starting point, but it doesn’t replace observation.
Choose the appropriate program, follow its schedule consistently, measure your nutrient solution, and watch how your plants respond. Once you’ve established that baseline, you’ll be in a much better position to make adjustments based on your crop and growing conditions.
If you haven’t chosen a program yet, start with the General Hydroponics Feed Charts Hub to compare nutrient lines and find the feeding approach that fits your grow.
A General Hydroponics feed chart gives you a week-by-week plan for using a nutrient program. It shows which products to use, how much to add, and how nutrient targets change as your plants move through different stages of growth.
Once you understand a few key parts of the chart—growth stage, application rates, EC, PPM, and pH—it becomes much easier to follow.
A feed chart turns a nutrient program into a practical feeding schedule.
Depending on the program, a General Hydroponics feed chart may show:
The important thing to remember is that a feed chart isn’t simply a list of products. It’s a progression. Products and application rates can change as plants move from early growth through vegetative growth, flowering, ripening, and finish.
Most feed charts organize the growing cycle into weeks, stages, or a combination of both.
The week number gives you a reference point within the schedule, but plants don’t always develop according to an exact calendar. Growing environment, plant variety, lighting, temperature, and other conditions can all influence how quickly a plant develops.
That’s why it’s important to consider both the week number and the actual growth stage of your plants.
Depending on the program, stages may include propagation, seedling, vegetative growth, transition, early bloom, mid bloom, late bloom, ripening, and finish.
Use the schedule as your baseline, but pay attention to what is happening in the crop rather than advancing through the chart simply because another week has passed.
Each week or growth stage identifies the products used at that point in the program and their recommended application rates.
If a product isn’t listed for a particular stage, don’t assume that it should be added anyway. Follow the schedule for the program you’re using.
Pay close attention to the unit of measurement. Depending on the product and program, rates may be expressed as:
Rates are generally expressed relative to a volume of water.
For example, if a chart calls for 5 mL per gallon and you’re preparing 10 gallons of water, you would need 50 mL at that rate.
Always verify both the number and the unit before mixing.
Application rates tell you how much product to add. EC, PPM, and pH help you understand the solution you’ve created.
EC, or electrical conductivity, measures the conductivity of the nutrient solution and provides a useful indication of its overall mineral strength.
As nutrient concentration increases, EC generally increases as well.
If your feed program provides a target EC range, compare your mixed solution with that range rather than assuming that adding the listed amount will always produce exactly the same reading. Your starting water and growing conditions can affect the final measurement.
PPM is another way nutrient strength may be displayed.
PPM meters typically convert an EC measurement using a particular scale. Two common scales are PPM 500 and PPM 700.
That means the same nutrient solution can produce different PPM numbers depending on the scale your meter uses.
Before comparing your meter reading with a feed chart, know which scale you’re using.
If you’re unsure, EC provides a useful common reference because it doesn’t require that PPM conversion.
pH tells you how acidic or alkaline your nutrient solution is.
The appropriate range can depend on the nutrient program and growing system, so use the target provided for your program when one is available.
Generally, check pH after nutrients and supplements have been added to the water and thoroughly mixed. Adjusting the water first can give you a reading that changes significantly once the nutrients are added.
Start with the General Hydroponics nutrient line you’re actually using.
FloraSeries, FloraNova, FloraPro, Maxi Series, and other GH systems have their own feeding approaches. Don’t assume that rates or targets from one program apply to another.
Some GH nutrient systems offer more than one feeding schedule.
Depending on the program, you may encounter options such as Light, Medium, Aggressive, Standard, or High EC.
Choose the schedule appropriate for your nutrient system, growing environment, and plants rather than automatically selecting the strongest option.
Locate the week or growth stage that most closely matches your plants.
Use the week number as a reference, but also consider what you’re seeing in the crop.
Identify every product listed for that week and note its application rate.
Check the unit carefully before measuring anything.
Adjust the chart rate for the amount of water you’re preparing.
If the chart specifies a rate per gallon, multiply that rate by the number of gallons in your reservoir or mixing container.
Start with water and add each nutrient or supplement individually according to the instructions for your program.
Allow products to disperse into the water as directed rather than combining concentrated nutrients together before dilution.
Some GH programs have additional mixing or stock-solution instructions, so check the notes associated with your specific feed program before mixing.
Once the solution is thoroughly mixed, check its strength.
Compare the measurement with the target range provided by your feed program, keeping in mind the PPM scale if you’re using PPM rather than EC.
Measure the pH of the finished nutrient solution and adjust it when necessary to reach the appropriate range for your program and growing system.
A feed chart gives you a consistent baseline, but your plants still provide important information.
Watch plant growth and overall crop response as you follow the program. Establishing a consistent routine makes it much easier to recognize when an adjustment may actually be needed.
A few simple mistakes can make a feeding schedule harder to follow than it needs to be.
Using the wrong chart.
Make sure the feed chart matches the nutrient line and program you’re actually using.
Confusing units.
5 mL per gallon and 5 mL per liter are very different application rates. Always check the unit.
Using the wrong PPM scale.
Know whether your meter reports PPM 500, PPM 700, or EC before comparing its reading with the chart.
Mixing concentrated nutrients together.
Add nutrients to water according to the program’s mixing instructions rather than combining concentrates before dilution.
Adjusting pH too early.
Check the finished nutrient solution after the products have been mixed.
Starting with the strongest schedule.
More nutrients aren’t automatically better. Choose the schedule appropriate for your plants and growing conditions.
Switching between schedules without a reason.
Changing programs or strengths partway through a grow can make it difficult to establish a consistent baseline or understand how your plants are responding.
Treating EC or PPM as a dosage instruction.
Application rates tell you how much product to add. EC and PPM are measurements of the resulting nutrient solution. Use both pieces of information together.
A General Hydroponics feed chart gives you a structured starting point, but it doesn’t replace observation.
Choose the appropriate program, follow its schedule consistently, measure your nutrient solution, and watch how your plants respond. Once you’ve established that baseline, you’ll be in a much better position to make adjustments based on your crop and growing conditions.
If you haven’t chosen a program yet, start with the General Hydroponics Feed Charts Hub to compare nutrient lines and find the feeding approach that fits your grow.
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