Great pocket game. Well done!
Few thoughts I'd like to see;
Visually distinction;
* Stages of growth:
Soil, Sprout, Baby, Adolescent, Adult / Flowering, Dead
Each stage is visually distinct, in HSV and shape language if possible
"Orange dried/dead leaves are curled up with jagged stems"
* Status:
Growth % on pot or visibly queued (e.g. flower at 100%)
Water gauge all the time
* Passage of time:
Additional Mechanic - A hands clock. or digital
Additional Mechanic - calendar + day notes.
Additional Mechanic - window interest; Day/night, random weather, birds perched on ledge, nosy neighbors peeking in, etc.
* Ownership:
Additional Mechanic - Furnish your room
Additional Mechanic - Dress your skelly
Risk / reward;
under/over watering = underdeveloped, stunted/nonflowering, or dead plant
Clicking in an area with no dead leaves harms the plant - trims a leaf/flower
Additional Mechanic - Buyers looking for a particular kind of plant. Keep the 100% plant = x coin, but have buyer multiplier.
Additional Mechanic - save / plant your own seeds, or buy a already rooted plant (from shop as is). Your seeds may not germinate. Or you may get few seed from your plant.