thats true as well in another point of view. Ive grown plants naturally with no help from me other than water and they always do more poorly than one that is taken care of and fed right.
Since your growing in soil why not use nutes? Very hard to fuck em up in soil. If you need to get a ppm meter to let you know what strength nutes you need until you get the eye for what your plants are asking for.
take this example,
these are leaves to a happy plant. They tell me they a doing good other than the bits of leaf theyve lots due to bug snacks.
These are plants that have been sligtly heat stressed near the plants tops.
this tells me that they are getting to hot, too much light, and that I may not be watering/feeding frequently enough because of the burnt look and the ADDITON of that little leaf edge curled up.
Stuck my finger in the dirt and low and behold! It was bone dry with a temp of 103F that day. It stays in the direct sun for 2/3 of the day...