Growing tomatoes is a rewarding and enjoyable experience, especially when they are grown in the right conditions. One popular way of growing tomatoes is by using ready-made grow bags. These bags are pre-prepared and packed with nutrients that make them ready for planting. Grow bags are an ideal option for those who have limited space, want to avoid the hassle of soil preparation, or want to grow their tomatoes in a portable and eco-friendly way. In this article, we will explore the benefits of using ready-made grow bags for growing tomatoes, as well as tips on choosing the right grow bag (Amazon link – opens in a new tab), planting and caring for tomato plants, and alternative container types that can be used.

Watering Tomato Plants in a Grow Bag
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Advantages of Using Ready-Made Tomato Grow Bags

Growing tomatoes in ready-made grow bags offers several benefits over traditional methods of gardening. Here are some advantages of using ready-made grow bags:

Convenience and Ease of Use

Ready-made grow bags come pre-filled with soil and nutrients, eliminating the need for time-consuming and messy soil preparation.

Consistency of Soil Quality and Nutrient Levels

Grow bags are made from high-quality soil mixes that are blended with essential nutrients such as phosphorus, nitrogen, and potassium. The consistent nutrient levels in the soil help to promote healthy plant growth and improve the flavour and yield of the tomatoes.

Space-saving and Portability Features

Ready-made grow bags are designed to be space-saving and can be placed in small areas such as balconies, patios, or rooftops. They are also lightweight and portable, making it easy to move them around and adjust their position to take advantage of the best sunlight.

Sustainability and Eco-friendliness of Grow Bags

Most grow bags are made from biodegradable materials such as coconut coir, peat moss, or recycled plastic. These materials are environmentally friendly and can be easily disposed of after use, reducing the environmental impact of gardening. By using ready-made grow bags, gardeners can enjoy these benefits while also growing healthy and delicious tomatoes. In the next section, we will discuss how to plant tomatoes in ready-made grow bags.

Find this Tomorite Tomato Grow Bag on Amazon

Tomato Grow Bags with Grow Frame
Tomato Grow Bags with Grow Frame

How to Plant Tomatoes in Grow Bags

To successfully plant tomatoes in ready-made grow bags, follow these steps:

1 – Germinate your Seeds

Start by germinating your tomato seedlings in a separate container filled with seed starting mix. Keep the soil moist and warm and provide plenty of light to encourage strong and healthy seedlings.

2 – Prepare the Grow Bag

Each grow bag will usually hold 3-4 tomato plants. You can remove the entire centre strip of the bag or just cut small holes into the plastic ready for planting. The bag is likely to have instructions for this too.

3 – Plant the Tomato Seedling

Gently remove the tomato seedling from its container and place it in the depression, making sure that the roots are fully covered by the soil. Press down gently around the base of the plant to ensure that it is secure.

4 – Water the Plant

Water the plant thoroughly after planting, making sure that the soil is evenly moist but not waterlogged. Continue to water the plant regularly, being careful not to let the soil dry out completely.

5 – Add Support for the Plant

As the tomato plant grows, it will need support to prevent it from bending or breaking under the weight of the fruit. You can use stakes, cages, or trellises to support the plant, securing them firmly to the grow bag.

Planting Tomatoes in a Grow Bag
Planting Tomatoes in a Grow Bag

Care and Maintenance of Tomatoes in Tomato Grow Bags

To ensure healthy growth and a bountiful harvest of tomatoes, it is important to properly care for and maintain your plants in ready-made grow bags. Here are some tips to help you get started:


Tomatoes in grow bags require regular watering to thrive. Keep the soil moist but not waterlogged and avoid letting the soil dry out completely. It is important to water the plants evenly to prevent uneven fruit ripening.

In the heat of the Summer, tomato plants will require watering at least once but usually twice a day – morning and evening.


While ready-made grow bags are already packed with nutrients, you can still use specific tomato feed according to the manufacturer’s instructions.


Prune and pinch out any unwanted side shoots to promote healthy growth and to ensure that the plant’s energy is directed towards fruit production. Remove any yellow or dead leaves, and trim back any excess growth that is not contributing to fruit production.


As the tomato plants grow, they will need support to prevent them from bending or breaking under the weight of the fruit. Use stakes, cages, or trellises to support the plant, securing them firmly to the grow bag.

Pest and disease control

Monitor your tomato plants regularly for signs of pests and diseases. Common tomato pests include aphids, whiteflies, and tomato hornworms. If you notice any pests or diseases, treat them immediately.

Tomatoes in Grow Bags
Tomatoes in Grow Bags

Harvesting and Storing Tomatoes Grown in Ready-Made Grow Bags

Once your tomato plants have reached maturity, it is time to harvest your homegrown tomatoes. Here are some tips to help you harvest and store your tomatoes:


Pick your tomatoes when they are fully ripe and have reached their desired size and colour. Gently twist the tomato from the vine to avoid damaging the plant. It is best to harvest your tomatoes in the morning when they are cool and firm.


Tomatoes are best stored at room temperature and away from direct sunlight. Do not store them in the refrigerator, as this can cause the tomatoes to lose flavour and texture.

If you have harvested more tomatoes than you can eat, consider canning, freezing, or drying them for future use.

Alternatives to Ready-Made Grow Bags

While ready-made grow bags can be a convenient option for growing tomatoes, there are also other alternatives that you can consider. Here are a few options to explore:

Traditional Garden Beds

You can grow tomatoes in traditional garden beds, either directly in the ground or in raised beds. This option allows you to customize the soil composition and is generally a more affordable option.

DIY Grow Bags

If you are looking for a more affordable option, you can make your own grow bags using materials such as burlap or landscape fabric. Simply fill the bags with soil and nutrients and plant your tomato seedlings.


Tomatoes can also be grown in containers such as pots or buckets. This option is ideal for those with limited space or for those who want to move their plants around to take advantage of sunlight.

Tomato Plants Planted in Carrier Bags
Tomato Plants Planted in Carrier Bags

How to Make Home-Made Tomato Grow Bags

If you have decided to use an alternative to ready-made grow bags, such as a DIY grow bag or a container, here are some steps to prepare the bag for planting:

1 – Choose the Right Material

Choose a material that is breathable, durable, and able to hold soil and nutrients. Some popular options include burlap, landscape fabric, and recycled materials such as old cloth or sacks.

2 – Prepare the Grow Bag Before Planting

Cut the material to the desired size for your grow bag. Make sure that the bag is at least 4-6 inches deep to provide ample room for root growth. Fill the bag with a quality potting mix or compost, and add nutrients according to the manufacturer’s instructions. Mix the soil and nutrients well. Water the soil thoroughly and allow it to settle for a few hours before planting.

3 – Add Fertiliser and Other Nutrients to the Grow Bag

Adding fertiliser and other nutrients to the soil can help your tomato plants grow strong and healthy. Use a balanced fertiliser with equal parts nitrogen, phosphorus, and potassium.

You can also add compost or other organic materials to the soil for added nutrients.

4 – Choose the Best Location for the Grow Bag

Tomatoes require at least 6-8 hours of direct sunlight per day, so choose a location that receives ample sunlight. Make sure the location is also sheltered from strong winds and extreme temperatures. If you are using a container, make sure it has proper drainage to prevent waterlogging.

Tying Tomato Plants to a Stake
Tying Tomato Plants to a Stake

What Can Go Wrong with Tomato Plants in Grow Bags?

Growing in bags is very different from growing directly in the ground. Problems can quickly compound and be more severeJoe Hannan, Commercial Horticultural Field Specialist, Iowa State University. Below we will have a look at a few things that could go wrong with your tomato plant.


You are not the only one that wants to eat your tomatoes, there are numerous insects that you must watch out for. These little critters are all vying for a piece of your well-earned fruit and they are not paying customers!

Greenhouse Whiteflies

The tiny Whiteflies will literally suck the life out of your plants. The Whitefly is a pest that feeds on the plant’s phloem which is used to transport nutrients around the plant. There are a few different ways to control the population of whiteflies including organic pesticides and even introducing natural Whitefly predators.

Spider Mites

These tiny little red spider mites also eat the sap from your plants and a large infestation can do serious damage to your plants. Often when you have a serious infestation the plants can be covered in silk webbing.                                                                     

Aphids (Blackfly & Greenfly)

Aphids are another little critter that will feed on your plants in much the same way as the Whitefly. Aphids can be controlled by regular washing of the plant.

Leaf Mould

Leaf mould is caused by a fungus and you can recognise it when the upper sides of the leaves have yellow blotches and there is a brown mould underneath.


The best prevention for this is to purchase disease-resistant seeds.


You are not the only one that wants to eat your tomatoes, there are numerous insects that you must watch out for. These little critters are all vying for a piece of your well-earned fruit and they are not paying customers!

Virus Diseases

This can be recognised by stunted plants and mottled leaves that are distorted and streaked.


Disease-resistant seeds. Controlling Aphid and Thrip populations that can spread the diseases.


None. Destroy the plants by burning them.


In conclusion, growing tomatoes in ready-made grow bags is a convenient and effective way to cultivate healthy tomato plants. These pre-prepared bags are packed with nutrients and require minimal preparation before planting. However, for those who prefer an alternative to ready-made grow bags, a DIY grow bag or container can also be a viable option with proper preparation and care. Regardless of the method used, proper care and maintenance are crucial for successful tomato growth. With proper watering, fertilisation, and pest control, you can enjoy a bountiful harvest of delicious, homegrown tomatoes in your garden or on your balcony.

Tips for Pinching Out Tomato Plants Infographic
Tips for Pinching Out Tomato Plants Infographic

Garden Doctor Tips

“Place the grow bag in a sunny location that receives at least 6 hours of direct sunlight per day!”

“When planting, make sure to bury the tomato seedling up to the first set of leaves to encourage strong root development!”

“Prune the tomato plant regularly by removing all yellowing and lower leaves to promote good airflow and prevent disease!”

“Water the tomato plant deeply 2-3 times per week, depending on weather conditions, and avoid getting water on the leaves to prevent disease!”

Frequently Asked Questions

When is the best time to water tomatoes?

The best time of day to water tomatoes is in the early morning, ideally between 6am and 10am. This allows the plants to absorb the water they need before the heat of the day sets in and also gives the leaves and soil time to dry out before nightfall.

Should I water tomatoes at night?

Watering in the evening can lead to prolonged leaf wetness, which can increase the risk of fungal diseases. Additionally, watering in the middle of the day, when the sun is at its hottest, can cause the water to evaporate before the plants can absorb it, leading to water stress and reduced growth.

Do tomatoes grow well in grow bags?

Yes, tomatoes grow well in grow bags as long as they receive proper care and maintenance.

What is the best size grow bag for tomatoes?

A 5 to 10-gallon grow bag is ideal for growing tomatoes.

Is it better to grow tomatoes in pots or grow bags?

Grow bags are generally better than pots for growing tomatoes because they provide better aeration and drainage.

Do you put drainage holes in tomato grow bags?

Yes, it is important to put drainage holes in tomato grow bags for proper drainage and aeration and to prevent waterlogging. Most ready-made grow bags will already have small holes present.

How often do you feed tomatoes in a grow bag?

Tomatoes in grow bags should be fed every 2 to 3 weeks with a balanced fertiliser but this will depend on the type of grow bag and the instructions of your desired tomato feed.

Should grow bags be elevated?

Elevating grow bags can help with drainage and aeration, but it is not necessary.

Do tomatoes in grow bags need feeding?

Yes, tomatoes in grow bags need regular feeding with a balanced fertiliser.

Should I water tomatoes every day?

In the heat of the summer and when the plants are getting 6-8 hours of direct sunlight, tomato plants will indeed need watering daily. This is best done first thing in the morning.

Can you use a tomato grow bag twice?

In most cases, tomato grow bags are single-use. They contain enough balanced nutrition to last one season.

Why is my tomato plant flowering but no fruit?

Flowering without fruit can be caused by several factors, including inadequate pollination, extreme temperatures, and nutrient deficiencies.

How do I ripen tomatoes?

If your tomatoes are still a little green at the end of the season, you can aid them in ripening by cutting whole trusses and leaving them on a well-lit windowsill.


Trevor Wright is not just a seasoned horticulturist; he’s the esteemed Garden Doctor. With a BSc in Horticulture and years of hands-on experience in the soil, Trevor has become a trusted mentor for all things gardening. As the founder of Garden Doctor, he’s committed to clarifying the intricacies of gardening, offering straightforward advice that’s rooted in years of practice. His writing is a garden of how-tos, savvy insights, and comprehensive guides that enable individuals to nurture and grow their garden dreams. When he’s not knee-deep in garden beds, Trevor is at his keyboard passing on his green-thumbed wisdom to budding gardeners, ensuring that the legacy of sustainable and joyful gardening blossoms far and wide.

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