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Growing Cucumbers in Grow Bags: 8 Steps for Healthy Growth

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Growing cucumbers in grow bags can be tricky; all you need to do is to provide the right conditions by understanding how grow bags work with respect to cucumbers.

  1. Choose a durable grow bag.
  2. Use a potting mix with organic material.
  3. Select a quality Seed.
  4. Plant the Cucumber Seeds in Potting Mix
  5. Choose a good location where it gets 6 to 8 hours of sunlight each day.
  6. Provide a trellis for the plant to climb.
  7. Water Regularly.
  8. Harvest.

Growing cucumbers in grow bags are a great way to get the most out of your space, and there are some things to consider to get higher yielding cucumber crop which we will explain further in this article.

Tips to Grow Cucumber in Grow Bags

Cucumber Growing in Bags

Cucumbers can be grown both indoors and outdoors in grow bags under the right conditions.

They are a warm weather vegetable and prefer temperatures between 60 – 70 degrees and like full sun. 

Having the right soil mix, good drainage, and enough water for your cucumbers to grow well is essential.

The following are some step-wise tips you should follow on how to care for your cucumber plants. These tips will help you grow cucumbers well and maximize their yield:

1. Choose a Durable Grow Bag

A grow bag should provide enough space for the plant to grow a healthy root system and also spread to the ground or surrounding trellis.

A grow bag will also give you the option of mobility where the entire plant can be moved if the conditions in that particular location is not ideal for the plant.

The size and material of the grow bag will help you determine the number of seeds that should be planted in the grow bag.

Smaller grow bags will require fewer plants per container, for example, a 5-gallon container will accommodate 1 to 2 plants.

Too many plants in the same container will cause the plants to fight for space and nutrients.

2. Use a Potting Mix with Organic Material

The soil should be moist and well-composted. Prepare the soil by adding compost, manure, and other organic materials to the top 12 inches of soil.

You can use a mixture of peat moss and sand for the bedding. You can also add diluted liquid fertilizer for the healthy growth of plants.

Typically, use about 1⁄2 teaspoon for each gallon. But fertilizing the plant with a diluted liquid fertilizer every few weeks is essential.

3. Choosing a Good Quality Seed Packet

Start with a good-quality seed packet.

Place your seed packet into the bottom of your grow bag. While planting the seeds, leave about 2 inches between each plant.

This ensures that there is no competition between plants for nutrients, and they grow well.

4. Plant the Cucumber Seeds in Potting Mix in the Chosen Grow Bag

Plant the cucumber seeds in a grow bag filled with potting mix or soil with little fertilizer or organic materials added. Use a potting mix that has good drainage and is not too heavy.

Also, put a thin layer of mulch to help the soil retain water and protect the seeds from heat.

Cucumber seeds may take 3 to 5 days to germinate at 80 F to 90 F. Germination may take 10 days or longer at cooler temperatures.

5. Choose a Good Location

Select a location with full sun exposure and well-drained soil.

The cucumber will need at least six hours of sunlight per day, so placing the bag in an area that receives a lot of natural light is best.

Be sure to avoid placing the plant close to larger plants or trees because they tend to cast large and long shadows that will cut the direct light to the plant.

Also, consider how windy the area is. Cucumbers in grow bags can draw a lot of water out of the soil, and this will dry out the soil quickly and increase the water demand of the plant.

6. Provide a Trellis

Cucumbers are vining vegetables with tendrils that allow them to climb up support such as a trellis or fence.

Without such support, the plant will tend to fall over and run on the ground. This can cause the plant to take up essential gardening space.

If you have the space to grow cucumbers on the ground, you should have a mulched area for the cucumber vine to spread without being attacked by pests and diseases.

A trellis can be anything that supports the vines’ growth. It can be made from wood, metal, plastic, bamboo, and should be around 4 to 6 feet in height.

The trellis can be placed anywhere around the the plant or staked into the soil and should be placed before transplanting seedlings into the soil or sowing new cucumber seeds.

This keeps them above the ground so that they are not easily accessible to pests and diseases while providing good airflow around the plant.

If you do not have a trellis, then place the grow bag on a sturdy table or shelf.

7. Regularly Water the Plants

Cucumbers love water and can quickly draw the water out of the soil, leaving it dry. Grow bags do not make retaining water any easier as they are very porus.

The amount of water needed depends on the type of soil used, and the porosity of the grow bag.

Watering with hoses can be fun initially but can become tedious over time. A drip irrigation system can help to provide a constant supply of water for the plants to produce healthy fruits.

Cucumbers need around 1 and 2 inches of water weekly. Water the plant regularly to keep it moist but not wet, as cucumbers dislike soggy or wet conditions as it may cause root rot and diseases.

You can always check whether cucumbers need more water by performing a manual test. This is done by placing your finger in the soil and feeling for the water content or moistness.

See our detailed post on watering plants in fabric pots.

8. Harvesting the Cucumbers

Harvest your cucumbers regularly so they don’t get too big or bitter, and you’ll have a continuous supply of fresh produce! Keep a check on your cucumber plant and harvest it whenever they are ready.

Ideally, harvest when cucumbers are about 6 inches long and not too fat.

So, these were the stepwise tips to plant cucumbers in grow bags effectively. Follow this to ensure you get a healthy harvest of cucumbers.

Growing Cucumbers Indoors in Grow bags

When growing cucumbers indoors compared to the outdoors, the only difference is the lighting. You still need to provide light to the plants during the day.

Indoor growers use artificial lights instead of natural sunlight. Artificial lights mimic the sun by emitting light throughout the entire spectrum of visible light.

Cucumber plants should be positioned 4 to 8 inches below a full-spectrum fluorescent light fixture, containing at least 2 tubes but no more than 6. 

Indoor growers usually place the plants on trays filled with potting mix. They then cover the trays with plastic wrap or clear film to prevent moisture loss.

Cucumber seeds germinate quickly indoors. So, you can start planting them within two weeks after receiving the seedlings.

You can plant the seeds directly into the fabric pots when they reach 2 to 3 inches high. Usually about 3 weeks old.

Grow lights should be on for 12 to 16 hours daily. Run the lights during the natural daylight hours, turning the lights off when it becomes dark outside to sync with the plant’s natural circadian rhythm.

Raise the light fixture or lower the fabric pot as the plant grows, keeping the foliage 4 to 8 inches below the lights.

The water movement from indoor grow bags will be less than grow bags outdoors.

As a result, watering requirements will be less than that of cucumbers which are grown outdoors because of the lack of wind and the soil’s exposure to direct sunlight.

Best Grow Bags to Grow Cucumbers

Grow bags are a popular way to grow vegetables and fruits. They are more convenient than traditional gardening methods because they can quickly move around.

The fabric pots can be reused and also lasts a long time when cared for properly.

Cucumbers are a popular vegetable that grow well in grow bags. Therefore, choosing the right to grow bags for your needs is essential because it will determine how big or small your cucumber will be.

There are many factors to consider when choosing grow bags for cucumbers.

Significant factors are the size and material of the bag.


One of the most critical factors in growing healthy cucumbers is the size of the grow bag. Cucumbers are vine vegetables that grow in long, cylindrical shapes.

Hence, the container size will affect how well cucumbers grow because they need space to spread out and grow their vines.

A small grow bag will do if you are growing just a few plants. But if you are growing many plants, it is best to get a bigger one that will allow for more room for growth.

Ideally, they must be grown in a container at least 18 inches deep and wide. The container should have holes in the bottom for drainage and sides for air circulation.


The grow bag is not just a container for holding the soil and water. Its material is an essential factor in growing healthy cucumbers.

The grow bag must be made of a breathable material that will allow air to circulate freely. This helps to keep the soil moist and prevents it from drying out, which can lead to root rot and other fungal diseases.

A breathable grow bag also helps with temperature regulation. Some materials used in grow bags are polypropylene, polyethylene, and nylon. But these materials are not biodegradable, so they will not decompose after being discarded.

This can cause problems such as greenhouse gas emissions and water pollution. Hence, the material of the grow bag is an essential factor in growing healthy cucumbers.

It affects the air and water quality inside the bag and its durability to withstand environmental elements such as wind, rain, hail, and ultraviolet radiation from sunlight (UV).

So, these were the two significant factors that play a determining role in choosing the right grow bag for the healthy growth of cucumbers.

Soil Mix for Cucumbers in Grow Bags

A grow bag is a container made from plastic, cloth, or other material that holds soil and allows plants to grow. The soil mix for cucumbers in grow bags can vary depending on the climate and the type of cucumber being grown.

Cucumbers like warm weather and prefer a soil mix that is rich in organic matter. A good soil mix for cucumbers in grow bags contains peat moss, composted manure, and perlite.

The soil mix is prepared by mixing equal quantities of potting soil and sand. The ratio of these two components should be 1:1.

This ensures that the mixture is well-mixed before use so that the particles are evenly distributed throughout the container. You should add compost or slow-release fertilizer to give additional nutrients to the plant during the growth of cucumber in grow bags.

Vermiculite or perlite can also be mixed in the soil mixture to maintain the moisture levels in the soil.

So, this is how you can prepare a good soil mixture for the healthy growth of cucumbers. But besides that, you should also focus on the following factors when choosing soil for cucumbers. These are:

pH Level of the Soil

Ideally, the soil’s pH level for growing cucumber must be between 5.5-7.5.

Either you can look for the garden soil having this particular pH range, or you can adjust the soil’s pH level.

Both options will work well.

Combination of Soil and Fertilizer

Though you can plant the cucumbers only in soil, if fertilizer, compost, or other nutrients are added to the soil, then the quality of the soil mixture increases.

This is beneficial for the health of the plants.

Organic Content

The soil mixture used in the growth of cucumber must be made up of organic content. It should be non-toxic and organic and contain all the required nutrients, such as calcium, oxygen, hydrogen, etc., for cucumbers’ healthy and best growth.

So, keep these three things in mind to ensure you get the best quality soil for growing cucumber plants.

You can buy plain soil and add nutrients, fertilizer, or a ready-made soil mixture.

In the latter case, you will probably not be required to add any further nutrients for at least three months. Decide and choose/prepare the best soil mixture accordingly.

Supporting the Cucumber Vine in Grow Bags

A grow bag is a container with a fabric or plastic lining filled with soil and then used to grow plants.

The cucumber vine needs support to grow properly. One of the most common ways for plants to get support is through using a trellis or stake.

A trellis can be made from wood or metal and comes in various shapes and sizes.

For example, some are designed for specific plants, such as grapevines, while others provide more space between the rows of plants.

On the other hand, some people prefer to use stakes because they can be moved easily as the plant grows taller, and their location changes because of wind and temperature changes.

You can, according to your preference, use a trellis, stake, or fence to provide support for cucumber vines.

Regardless, the primary purpose of supporting cucumber vines is to reduce the space that each cucumber plant in a bag needs.

You can also plant cucumbers in a hanging bag that allows the vines to dangle on the ground. It also works as a great option to save space.

How Many Cucumbers Can You Grow in a Bag?

Cucumbers are a popular vegetable that you can grow in your garden. You can grow cucumbers on trellises, in grow bags, or in containers.

Because of the small size of cucumbers, you can also put them in a bag and grow them vertically.

There can be no fixed answer to this question. However, if one wants to estimate the number of cucumbers that can be grown in grow bags, then that would ideally depend upon the size of the grow bags.

Planting one seed would be great if you have a one-gallon bag. However, if you have a 5-gallon bag, you can increase the number of seeds. You can plant 2-3 seeds in the bag.

A pro tip is that you must always leave space between two seeds.

You should never try to plant more seeds in a bag than required because this will lead to the inadequate growth of cucumbers. The cucumbers cannot grow to their full potential.

Give them space to grow healthy in the grow bag and to their maximum potential as much as possible.

The Takeaway

Growing cucumbers may seem to be a daunting task. However, in reality, it is not. There is a simple process to follow, and you are all set to get a healthy harvest of cucumbers.

First, choose the right-to-grow bag and prepare the soil potting mix. Purchase the excellent quality seed packet. After that, put the soil in the grow bag and place the seeds in the soil.

Again cover it with soil. Place the plant at a good location where it gets adequate sunlight, at least 6 hours a day.

Water the plant regularly and keep a check on it. Take care of the plant and enjoy the healthy harvest of cucumbers.

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