Splitting and connecting information
Partial answer and some tips to this complex topic. See a similar recent topic here: How to organize nested time-of-day tiddlers under Journal days
If you have a repeating note pattern like “seeding density; transplanting; watering; harvesting; postharvest” for each crop, it could be beneficial to give it some structure. It will allow you to view this information in a more visually pleasing, organized way.
If your notes on any of this topic are very short, like one line of text, it might be easiest to create dedicated fields, where you type these notes.
You can create a view template which will present these information in a neat way.
If your notes on these topics are longer and more complex, you can split them to different tiddlers. I would recommend “connecting” them by namespace, that is for “Arugula” create “Arugula/watering” tiddler.
See the discussion linked above for more details about a very similar problem.
You can reliably find all “subtiddlers” using filters.
To make your life easier, you could create a view template, displayed for each crop, that transcludes these “subtiddlers” in a table or tabbed UI, and shows button to create the “subtiddlers” that do not exist yet.
Also, if you have Relink titles subplugin, it will recognize such relations (show them in backlinks, rename Arugula/watering if you rename Arugula).