Some seeds need to be dried first before they can be planted. This is true of many fruit trees, where the seed is encased in a fruit that needs to be removed before planting. The seeds of many herbaceous perennials can also be planted fresh, but there are exceptions. For example, geranium seeds must be sown after they’ve been dried in an oven at 200 degrees Fahrenheit for 30 minutes or longer. Some seeds require special treatment before planting. For example, peppermint seeds need to be soaked in water for 10 days before sowing; rosemary and lemon balm seeds should be placed in damp paper towels and kept moist until they sprout, and onion seeds need to be soaked overnight before planting so that they will germinate more quickly. Cannabis seeds can be planted fresh, or after they have been dried and cured. In fact, there are advantages to both options. Freshly harvested seeds have a higher germination rate than dried and cured ones, but they also produce weaker plants that are more susceptible to pests and disease. If you live in an area where the growing season is very short, or if you want to start your plants indoors before transplanting them outdoors, later on, starting with dried and cured seeds may be a better option for you.