The gardening skill in The Sims 4 allows you to graft and splice a variety of plants. Here are some of the most popular combinations:

• Bird of Paradise: Tulip + Chrysanthemum
• Bonsai Buds: Strawberry + Daisy
• Cowplant Berry: Dragonfruit + Snapdragon. This combination creates the Cowplant Berry, which can be used to grow Cowplants.
• Death Flower: Orchid + Pomegranate
• Dragonfruit: Strawberry + Snapdragon
• Fruitcake Plant: Banana and Pomegranate. Can be used to bake Fruitcakes.
• Parsley: Sage + Basil
• Plantain: Pear + Lemon
• Pomegranate: Apple + Cherry
• Root Vegetable Medley: Potato and Carrot. Can be used to make Root Vegetable Medley Soup.
• Super Melon: Melon and Watermelon. It is worth more money than regular melons.
• Vegetable Medley: Tomato and Eggplant. Can be used to make Vegetable Medley Salad.

These are just a few of the many plant combinations that you can create with the gardening skill. With a little experimentation, you can create your own unique and delicious plants. It is important to note that some plants cannot be grafted together, such as mushrooms and the Sixam Mosquito Trap.