Suggested fix (unconfirmed): Make and sell fruit smoothies and power smoothies at the cooking station using wild berries, sugar, and tomatoes. Also, spend your points on the progression page to unlock upgrades.
The problem
How are we supposed to upgrade how many items we have on our plot because i can't seem to get any money to upgrade them, this game is not cosy it is frustrating ! How do you get enough money to buy plants at the price there are most are 10 for 1 seed, i have 75 of the blue diamonds and they have not gone up at all in the 19 hours i have played and done loads of the game.
Suggested fix (unconfirmed): Go to your housing island to trigger the reward banner, then check the bottom of the tops section in your character customization menu.
Day One Fixes