Improving crop quality comes down to farming level and fertilizer mostly. Get basic or quality fertilizer in the ground before planting anything, and make sure to grab farmers lunch for that +3 skill boost when harvesting. Running sprinklers keeps everything watered which is essential, and the greenhouse lets you keep this going year-round if you've got it. Multi-harvest crops like blueberries give more chances at quality produce, so they're worth the investment.

Just dont mix up speed-gro with quality boosters, since deluxe speed-gro only makes things grow faster not better. Your farming skill is doing most of the work here, so focus on leveling that up first. Quality fertilizer plus high farming skill is your best shot at gold star crops, and remember you cant get iridium quality on regular crops no matter what anyone tells you gold stars the max.

Tip for newer farmers most people waste resources on deluxe speed-gro thinking itll improve quality when regular quality fertilizer works way better for what you want