Never pay for seeds again
Buy about 6 seed packets from the supermarket. They can be any kind. When you're ready to plant make your sim walk very far away. Then you click on the garden patch and click on the seeds you bought. It will say free x6 if you bought 6 seed packets. Then quickly go to the town map before the sim reaches the gardening patch and go to another sims house, or use the sim tracker. When you click on another garden patch the number of seeds doesn't decrease. To save money so this cheat but buy only one seed packet. All of your sims will be able to plant as long as you do the cheat right. WARNING! THE NUMBER OF SEEDS WILL DECREASE WHEN YOUR SIMS ARE DONE PLANTING!!! So to make this cheat worth it, plant beans with this cheat in the day or overnight.