The best Stardew Valley Crops

Spring
The best crop in the spring are the strawberries. They cant be bought until the 13th at the egg festival, however once you've planted them and they have produced their first harvest, they will keep reproducing every 3 days which is very useful and cost effiecient. They sell for 120 G 150 G or 180 G depending on the quality (120 = normal 150 = silver 180 = gold).
The second best crop is the cauliflower because even though they are slow growing ( I would recommend speed gro especially after year 1) they have the chance to become giant crops which means you get a lot more cauliflower per harvest (to do this you simply have to plant the crops in a 9x9 formation and hope for the best. If you don't get the giant crop the first time you can simply leave the crops and hope it happens the next day) They sell for 175 G 218 G or 262 G.
Summer
The best crop in the summer are the blueberries. Like the strawberries, they reproduce every 4 days and will always drop 3 blueberries per crop with a 2% chance of spawning more. Unlike strawberries however, you can buy these on the 1st of summer so you will earn more money from these then the strawberries (on the first year). They sell for 50 G 62 G or 75 G.The second crop I would reccomend is the the red cabbage which is a pretty good crop but it isn't the most valuable. The starfruit is extremely valuable in fact the second most valuable in the game, however the seeds can only be bought from the desert and cost 400 G each. I recommend buying some starfruit seeds if you can afford them but to start off with get the red cabbage. Sells for 260 G 325 G or 390 G
Autumn
Cranberries are the most valuable crop (yes another berry) and eventhough they cost quite a bit they don't take long to grow nor reproduce and they always produce at least 2 berries. They sell for 75 G 93 G or 112 G.
For the second best crop I would invest in pumpkins. This is because, once again, they can turn into giant crops. They do take quite a long time to grow. Sells for 320 G 400 G or 480 G