Starting your garden indoors can be a great way to get a jump on the growing season, especially in colder climates. Here are 19 of the best seeds you can start indoors in winter:

1. Tomatoes: With a vast variety of sizes and flavors, tomatoes are a favorite. They require a warm, sunny spot to thrive.

2. Peppers: Both sweet and hot peppers need a long growing season, making them perfect for an indoor start.

3. Lettuce: A cool-season crop that’s fast-growing and can even be grown under lights.

4. Broccoli: This nutrient-rich vegetable can benefit from an early start indoors.

5. Eggplant: Starting eggplants early helps ensure you’ll have mature fruit by the end of summer.

6. Kale: Hardy and healthy, kale is great for an early indoor start.

7. Cabbage: This leafy green does well when started inside and transplanted outdoors later.

8. Cauliflower: Like its relatives broccoli and cabbage, cauliflower benefits from an early start.

9. Onions: By starting onions from seed indoors, you can develop stronger plants than from sets.

10. Leeks: Leeks require a long growing season, so starting them in winter is ideal.

11. Herbs (Basil, Cilantro, Parsley): Many herbs germinate quickly and can be used fresh from your windowsill garden.

12. Swiss Chard: Colorful and flavorful, chard can be started early for spring and summer harvesting.

13. Spinach: Another quick-growing green suitable for early indoor sowing.

14. Celery: Although challenging, celery seeds started indoors can lead to crisp stalks later on.

15. Squash (summer & winter varieties): Squash plants grow large but can be started inside if moved outdoors after the last frost carefully.

16. Melons: These sweet summertime fruits require a long growing season, so begin indoors for best results.

17. Cucumbers: Perfect for pickling or fresh salads, cucumbers should be started indoors 4-6 weeks before the last frost date.

18. Beans (Bush & Pole types): You can give beans a head start indoors; just make sure not to disturb their roots when transplanting.

19. Pumpkins: For an autumn harvest, pumpkins should be started indoors to mature in time for fall festivities.

By starting these seeds indoors, you take advantage of the winter months to get ahead on your gardening efforts, ensuring larger, healthier plants once it’s time to move them outside after the last frost date. Remember to provide plenty of light with grow lights or a sunny windowsill, keep the soil moist but not wet, and follow proper temperature guidelines for germination of each plant variety.