A chart is useful because it puts a sequence on the page. You can see the stages, the products and the quantities together.
The grow itself supplies the rest of the context.
Understand the units first
Millilitres per litre describes a concentration in prepared feed. It does not tell you how much total product you need until you know the litres you will prepare.
Grams per litre works the same way for a powder, but application frequency still matters. In the Crazy Hills reference chart, KICKOFF is a once-weekly application. Counting it in every watering would give a different routine and a different bill.
Read the whole sequence
The principal role of a product does not necessarily mean it is used only in the stage printed on the front. A growth feed can continue into part of flowering, and a bloom feed can be introduced during a transition.
Read the applicable guide rather than making an abrupt change based only on the product name.
Keep the substrate in the picture
A pot containing an amended soil starts with a different nutrient supply from a lightly fertilised medium. The chart cannot infer what is already in either one.
The same is true of water and products from another brand. They do not disappear from the plant's nutrition because the new chart does not list them.
Record what you actually do
A printed plan is the intention. Your grow notes are the record.
Write down the rate, the treated volume, the date and any change you make. When you ask for advice later, that record is much more useful than saying you followed the chart more or less.
Check the version
Products and instructions can change. Keep the pack label and batch information, and use the guide that applies to that version.
If an old download and a current page disagree, ask. The right next step is to resolve the difference, not average the rates.
Reviewed 8 October 2026