Ultimate Guide to Growing Cucumbers in Pots

Fruit and vegetables taste best when you grow them yourself. Growing cucumbers in pots is a great way to enjoy their fresh, homegrown. It is also a great choice if space is limited or your soil is poor. Growing cucumbers in pots also allows you to better control the heat and moisture levels that the cucumbers are exposed to.

Members of the cucurbitaceae family, along with squash and melon, cucumbers produce long sprawling vines. Despite this, cucumbers grow well in pots. As we will explain in this article, the key is to select a compact variety cucumber plant. You will also need to train its vines along a trellis or some form of support.

Growing your cucumbers in pots to have an upward habit also means that there is more space at the bottom, allowing you to grow another crop. Elevated fruit is also easier to harvest.

1 Cucs are known for their sprawling growth habitCucumbers are known for their sprawling growth habit. Despite this cucumbers are ideally suited to planting in pots. This method enables gardeners to better control the surrounding conditions, providing everything developing cucumbers need. 

Choosing the Correct Container for Planting

This rule applies to whatever fruit or vegetable you are cultivating in a container – the bigger the better. Large containers hold more soil. This means that they have more space for the plants roots to spread. The cucumbers also retain moisture better. This is particularly vital if you are growing cucumber in pots.

These plants require lots of water to grow correctly. A large pot will provide the plants with a consistent level of moisture. A 5 gallon container is ideal. Self watering containers, or earth boxes, are a great option. A more natural approach is to grow the plants in a straw bale garden.

The process of growing cucumbers in pots is partly dictated by the size of your pot and the variety of cuc you are growing. Larger containers are able to house more plants or larger types of cucumbers. Generally a 5 gallon container, roughly 20 inches in diameter, will hold two to three plants. A smaller 10 inch deep pot for planting will comfortably hold one plant.

2 Make sure you choose a container large enough to hold the variety you are growingMake sure you choose a container large enough to hold the variety you are planting. Vining or large types of cucumbers will require more space than dwarf or shrub varieties. Your chosen container should also be clean and have drainage holes in the bottom. 

Potting Soil

Fill your pot with good quality potting soil. Soil can be further enriched by working in some organic material such as homemade compost. A rich soil will not only help to keep the plants well fed, it will also retain moisture better than poor or garden soil.

Types of Cucumbers

There are two types of cucumber plants, bush varieties and vining varieties. Bush or compact varieties are best for growing cucumbers in containers if space is limited. However cucumbers don’t yield as heavily as vining varieties.

To extend the season, and increase your harvest, sow or plant bush varieties in succession. If you have an ample amount of space, and a large container, you can try to grow vining cucumbers in pots.

One of the most reliable is Saber F1. Ideal for urban areas where bees are rarer, this variety doesn’t require pollination. Maturing in 55 days it produces fruit that is 8-9 inches long. Another variety that doesn’t require pollination is h-19 Little Leaf. A pickling variety, its compact fruit, 3-4 inches long, will mature in about 58 days.

Paraiso F1 is a heavy yielding variety, its 10 inch long fruit will mature in 59 days. For something more unusual, Poona Kheera is an Indian variety. With attractive, golden skin the fruit of this variety is crisp and juicy. Another reliably productive plant, it will begin to fruit within 50 days, and can climb to heights of about 6ft.

Lemon Cucumber produces sweet, small, yellow fruit that can be eaten fresh or pickled. Diva also doesn’t require pollination. A popular variety because it is disease resistant and a reliable producer, it takes 58 days to mature.

Suyo, Salad Bush, Burpless, Early Pik, Sweet Success and Liberty are also all popular varieties for planting in container gardens.

3 Take the time to find a variety that suits your conditions as well as your own personal taste
Take the time to find a variety that suits your conditions as well as your own personal taste. You will find that there are plenty of options to choose from. Growing cucumbers in containers is not as restrictive as you may think. 

How to Grow Cucumbers From Seed

Regardless of whether you are growing cucumbers in containers or raised beds, remember that cucumbers are hot weather plants. Seeds can be sown early undercover. If you want to sow the seeds outside, in their final position wait until the soil has warmed and the last local frost date has passed.

Plant your chosen seeds undercover from early March. Seeds are best sown individually into small biodegradable containers. The seedlings can later be planted in their final position, still in the biodegradable container. This reduces the chances of you accidentally disturbing the roots while transplanting and causing transplant shock.

Fill the containers with fresh, general purpose compost. Plant each seed to a depth of about half an inch to an inch. Water the seeds well and cover with a clear plastic bag.

4 Sow two or three seeds in each container

Sow two or three seeds in each container. This will safeguard against some seeds failing. Should all the seeds germinate carefully pick out the weakest seedlings and allow the strongest plant to grow on. 

Place the seeds in a sunny position. Keep the soil moist.

Germination will usually occur within 10 days. Following germination, remove the plastic bag and place the containers or trays on a windowsill.

When the seedlings are at least 2 inches high the cucumbers can be transplanted into a container. When transplanting try to handle the seeds as gently as possible. Cucumber plants are sensitive to any form of disturbance. If the transplanting process is too traumatic it can cause the plants to fail.

Alternatively, you can plant your cucumber seeds straight into the container. If the containers are outside you should first warm the soil by covering it with soil or a plastic bag for about two weeks. When the soil feels warmer you can sow the seeds. Cucumbers need the warmth to grow.

Sow as per the previous instructions. However because you are sowing the seeds in their final position, space each seed roughly 40 inches apart. The exact spacing will vary depending on the variety you want to grow – check the seed packet before sowing.

Cucumber Care Guide

Growing cucumbers in containers is largely the same as cultivating the plants in the ground or a raised bed.

Position

When you grow cucumbers, remember that cucumbers need sunny positions and warm temperatures. Cucumbers need at least 6 hours of sunlight.

Also, cucumbers need some fertilizer – an organic fertilizer such as liquid kelp or fish emulsion, such as Neptune’s Harvest Organic Hydrolized Fish and Seaweed Fertilizer can be applied. Alternatively try making your own liquid plant feed at home. Liquid plant feeds are particularly useful because they can be easily incorporated into your watering routine.

Like in the soil, cucumbers in pots do best when the temperature averages 70 to 95 ℉.

5 If you are unable to provide constant temperatures outside

If you are unable to provide constant temperatures outside, try to grow cucumbers in pots undercover. A greenhouse, cold frame or even a light windowsill are all great places for cultivating temperature sensitive plants. 

Water

The most important thing to remember is that these plants thrive in moist soil. Regular watering of the plants is vital. Check the soil every morning, if it feels dry to the touch water the plants thoroughly.

When watering the plants, only water the soil. Damp leaves can be a breeding ground for disease.

Fertilizer

You can amend the soil with a granular fertilizer as you transplant the seedlings. Feed once a fortnight with a balanced liquid fertilizer, during the growing season. Organic options can also be used. Alternatively you can make your own liquid plant feed or compost tea at home.

Weeding

As we have already discussed, cucumbers are very sensitive. Cucumbers dislike any disturbance around their base. This can make weeding difficult. A homemade weed killer is a great way to keep soil weed free. Easy to apply, because it is made at home you know exactly what is in it, meaning that you aren’t adding any unpleasant chemicals to the garden. Homemade solutions are just as effective as commercial controls.

6 Cucumbers emerge from spent flowersCucumbers emerge from spent flowers. Be careful when tending your plants not to damage or remove any flowers. Removing flowers will impact on the amount of fruit you will be able to harvest.

Support

A trellis will help you to make the most of the plants vining habit. A tomato cage can make the ideal trellis if you are want to grow cucumbers. The best time to install the trellis is when you transplant the seedlings, or sow the seeds if you are sowing into the final position. Installing the support early means that you won’t risk damaging the roots of the plant later on. As the vines grow tie them loosely to the support. Don’t tie vines too tightly, this can damage the cucumbers.

7 Vining varieties in particular will require lots of sturdy supportVining varieties in particular will require lots of sturdy support. This is especially important when the plants are in fruit and are naturally more top heavy. Adequate support will prevent the plants from toppling or snapping. It will also raise fruit from the ground, protecting it from soil borne pests like cucumber beetles and diseases. 

When the main stem reaches the top of the trellis pinch out the growing point. Side shoots should be pinched out when two leaves have emerged beyond the female flower. The female flower is easily identifiable, you will notice  small fruit forming behind the flower. Flowerless side shoots can be pinched out when the cucumbers reach 2ft in length.

Companion Plants

Just because you grow cucumbers in pots doesn’t mean you can’t benefit from companion planting. Cucumbers do well alongside, or close to, carrots, beets, radishes, onions, peas, corn and beans.

8 If you are growing cucumbers in large pots try planting smaller crops such as lettuce or radishes in the same container

If you are growing cucumbers in large pots, try planting smaller crops such as lettuce or radishes in the same container. This is a great way of getting the most out of your soil. Just be careful not to disturb the root system of the cucumber. 

Cucumbers struggle when grown close to melons, potatoes and sage.

Common Cucumber Problems

Once established cucumbers are largely problem free. Cucumber beetles and squash bugs are the two most common problems. Regularly check plants for signs of infestation. An application of neem oil or soap water will cure most infestations. To prevent pests like cucumber beetles from striking, cover young plants with a garden fabric or mesh until the cucumbers begin to flower.

Powdery mildew, a white powder like substance that covers the leaves, can occur in overly humid locations. Properly spacing the plants, so that air can circulate, will help to prevent this issue. Powdery mildew can also be a sign that the plant is stressed.

Harvesting Cucumber Fruit

Depending on the variety it can take about twelve weeks from sowing the seeds to harvesting fruit. The fruit is ready to harvest when it reaches the desired size. If you are unsure how large your fruit should be, consult your seed packet. Many varieties can be harvested small. Some even taste better when the cucumbers are on the small or petite side.

The best time to harvest cucumbers is in the morning, before the temperatures increase too greatly.

Remove the fruit with a sharp knife or secateurs. Don’t pull fruit from the vine. This can damage the vine and lead to the plant becoming diseased.

9 Be careful when you harvest not to damage surrounding vines or younger fruitBe careful when you harvest not to damage surrounding vines or younger fruit. Hold the fruit firmly in one hand and cut cleanly away from the plant with a sharp knife.

Cut as and when you want. Harvesting regularly will encourage more fruit to form.

Be careful not to leave fruit on the vine too long before harvesting. Old fruit can become soft or bitter. Overly ripe fruit can also be overly seedy.

How to Store Fruit

Harvested cucumber fruit can be stored in a fridge for no more than ten days. Wrapping the fruit in cling film, or placing in an airtight bag, will help to keep the moisture in. This can help to increase the longevity of the cucumber slightly. For longer storage, or if you find yourself with a glut of the fruit, the cucumbers can be pickled.

10 Growing cucumbers in pots is a great way to cultivate the fruitThis is a great way to cultivate the fruit. As well as helping you to provide the right conditions, container gardening is also a great way to get the most out of your space. 

Growing in pots is a great way to cultivate this popular fruit. A great option for gardeners with poor soil it also helps you to provide the ideal conditions for the fruit. By growing undercover you can ensure that the plants enjoy the temperatures and also extend the season by up to four weeks.

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