Nice game! Simple yet good-looking graphics, especially I like the looks of plants. Cool planting system and impressive amount of content that you managed to make with the potion system.
Got some feedback if you don't mind:
Would be great if there was more some kind of visual feedback for the player actions, for example slight screen fade when you go to the next day or maybe little animations/particle effects when you interact with world.
Also I managed to get into funny situation when I had some potions and no money and no seeds to continue playing, and there was no orders for that potions I had :) Maybe should have wait more days)
Overall, very good job!