Starting Vegetable Seeds Indoors

By: Jennifer LaMontagne- Assistant Horticulturist- Bloch’s Farm- Green Lake, WI

Are you itching to grow some fresh vegetables of your own? You can start growing certain vegetable seeds indoors and then transplant them outdoors after the last frost. Take a look at the growing information on the seed packets of each vegetable for useful planting tips. In general, leeks, onions, celery, bell peppers, cabbage, and eggplant can be seeded indoors in late February or early March. Cauliflower, broccoli, brussel sprouts, lettuce, kale, swiss chard, and tomatoes can be seeded indoors in late March or early April. Watermelons, cucumbers, cantaloupe, sweet potatoes, zucchini, pumpkins can be seeded indoors in April.  

There are a variety of options for indoor seedling containers. You can use plastic, fiber, or paper pots, or you can reuse yogurt cartons (punching small holes for drainage). Seed starting soil mix is the best to use for starting seeds. If your seeds are unable to obtain enough natural lighting, a grow light may be helpful. A heat mat under the pots may also be beneficial for extra warmth to encourage growing. To cause less harm, use a spray bottle to gently mist seeds. Check seeds every day to make sure they are kept consistently moist but be careful not to overwater.

Before transplanting your seedlings outdoors, they need to become accustomed to their new environment. A few weeks before you plant the seedlings outside, set them on a shady porch or under a tree for a few hours, gradually increasing the time in the sun each day. Be sure to bring them back indoors for the night. After about two weeks, they should be acclimated enough to stay outdoors (assuming temperatures won’t drop below freezing at that point).

Bloch’s Farm is not yet open for the season, but we are busy getting ready for your spring planting needs. We will be offering curbside pick-up or delivery once we open. You are currently able to place an order online at If you have questions, feel free to call 920-294-6000 or email me at Growing beautiful flowers, shrubs, and trees can offer us hope during trying times, and it can be empowering to grow foods that help us sustain a healthy diet. Bloch’s Farm has a variety of seed packets available. Start planning your garden today!   

To protect the safety of the public and our employees, we carefully adhere to current health regulations and guidelines. Check out our website at and our Facebook page for updated information.

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