How to Grow Tomatoes in Grow Bags


Although many traditional gardeners grow large tomato plants in garden plots, these tasty fruits easily flourish in grow bags. Grow bags are long, narrow tubes that hold a variety of plants and can lay upon the surface of the soil in small raised gardens and planters. The minimal amount of space these small gardens require, make them suitable for patios, porches and other small, sunny areas. Enjoy the fresh taste of juicy tomatoes by growing some of these plants in grow bags.

Step 1

Start your tomato seeds in small, biodegradable seed pots to transplant into your grow bags. Plant your seeds in the springtime, about four to six weeks before the final frost. Fill your small pots with potting soil. Press two or three seeds evenly over the surface of each seed pot. Insert the seeds about 1/8 of an inch below the surface of the soil. Water your small seedlings until a few drops of excess moisture drain from the bottoms of the seed pots. Keep them slightly damp until ready to transplant into your grow bags.

Step 2

Prepare your grow bags for planting by rolling and compressing the bags. Break apart the compost in each bag to provide a smooth, even mix, free of clumps. Place the loosened bag in a sunny location, laying it over the top of the soil, and pressing it into a long, small mound.

Step 3

Poke four to six holes in the bottom surface of your grow bags to allow for water drainage. Use a sharp knife to cut out the marked squares along the upper section of your mounded grow bags. Use an old kitchen spoon to dig out enough soil from each square to provide adequate space for your small, biodegradable pots of tomato seedlings.

Step 4

Thin out your young seedlings to allow only the strongest seedling to remain in each seed pot. Cut away or tear off the upper rim of each biodegradable pot to make the rim even with the surface of the soil inside each pot. Press the small pots into the holes you prepared in the grow bags. Press some of the removed compost around the edges of each pot to hold them firmly in place and fill in any air gaps. Water until moisture drains from the grow bags' holes.

Step 5

Keep your grow bags slightly damp to encourage healthy growth. These grow bags retain moisture, requiring less frequent watering than tomatoes growing in garden soil. Check for soil moisture by inserting a finger near the base of one of your tomato plants. The soil should feel slightly cool and damp.

Step 6

Apply a liquid fertilizer when your tomato plants begin to blossom. Select a fertilizer labeled for use on tomato plants and apply as directed. Although these commercial, grow bags contain nutritious planting mediums, fertilizer can help your tomatoes form large, tasty fruits.

Things You'll Need

  • Biodegradable pots
  • Potting soil
  • Tomato seeds
  • Water
  • Commercial grow bags
  • Knife
  • Spoon
  • Fertilizer


  • British Broadcasting Corporation: Plant up a Growing Bag
  • Missouri State University Horticulture Department: Gardening in a Bag
  • "Waterwise House & Garden"; Allan Windust, 2003

Who Can Help

  • Cornell University: Ten Mistakes to Avoid When Growing Tomatoes
Keywords: grow bag tomatoes, grow bag plants, growing bag vegetables

About this Author

Laura Dee is a writer, artist, and the co-owner of Wallace & Wallace Copywriting,an online business which specializes in providing marketing materials and copy to various companies. She has written for Demand Studios since 2008 and is currently working on a series of childrens' picture books.