Farmer Bobbi usually grows some Coffee in the Greenhouse once a bean drops or the Traveling Cart Lady gets one.
However Coffee is Farmer Bobbi's Dichotomy: It is effort-intensive but it makes you go faster.
So, what to do when one strives for efficiency to serve their leisure time but needs to fit in a minimum of work here 'n there so she can retain her Farmer's Union card?
Generally she will grow 5-10 Coffee plants in the Greenhouse in mid-game (fixing the Greenhouse is always a Year 2 occurrence) and process the Beans outside near the Farmhouse so she can harvest and re-Keg while passing by on the way to somewhere more fun.
But Beanmaxxing for profit? There's no way that happens. Very early Farmer Bobbi in the Penny and Abigail days planted too many crops and made too many machines, built too many buildings, and yes sowed too many Coffee Beans, not knowing that the payoff for almost all of this is limited and the true value of things derives from time not spent. One often stumbles around in the dark before finding the light.
Coffee (and Hops, another putative financial windfall crop) are frequent producers so they levy a ponderous tax upon the psyche and spirit as you are either tied to your semi/daily chores or saddled with the inefficiency of skipping those infernally often harvest days and failing your cropsmaxxing regimen, thus cursed to spend your remaining farming days living with the guilt of delinquency to achieve some imaginary "optimal" amount of g.
I'm gonna guess CA didn't create the game as a vector for self-induced psychological trauma. So maybe don't do this? Well unless that's your thing, we're not here to judge ....much
Instead Farmer Bobbi counsels moderation in everything. For clarity, this 'moderation' exists at the very lowest extension of the Bell curve where it looks to runs out of space above zero but it's still totally above nothing, no really! Plant high individual value crops that harvest twice a season, or thrice a season w/Deluxe Speed-Gro if you need to plantmaxx something. Plant reharvestables that take a week to regrow. And most importantly:
Always feel free to skip a day. Skip 2 days, skip a week.
Do something fun instead and grab that crop... meh maybe next week. If you're processing things in Kegs/Jars and it's not ready in the morning, ignore it until tomorrow morning. Or tomorrow week.
Tomorrow week is totally a thing, Farmer Bobbi's calendar keeps showing more of 'em!