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Growing Squash in Containers & Pots

Squash plants are prolific annual sensations and the showpieces of any vegetable garden. One of the most rewarding aspects of growing squash, other than the fact that they are substantial fruit producers, is that there are so many squash varieties to grow.

Squash comes in all shapes, sizes, flavors, and even colorful patterns, which adds a fun diversity to the vegetable garden, but they often take up a lot of real estate. So, consider growing squash in containers. Growing squash in containers & pots can make this bountiful fruit production available to all gardeners despite their space constraints.

Containers & pots are excellent choices for growing squash, as you can control the soil quality of these heavy feeders and helps keep ground pests off of plants. Check out these tips to start successfully growing squash in containers & pots.

Ripe zucchini and flowers

Soil Composition & pH for Growing Squash in Containers

Amend your garden soil with rich organic matter and well-decomposed compost. Squash plants thrive best in nutrient-rich, well-draining soil. Consider layering a premium quality raised bed soil, worm castings, compost, and premium potting mix to create a healthy blend of nutrient-rich soil for your containers & pots. These prolific plants enjoy soil with an optimal pH range of about 6.5 to 7.

Light & Temperature Needs of Squash in Containers

Place your squash containers & pots in an area of the yard or garden that receives full sun.

  • Find a sunny location in your yard that will receive a minimum of 6 to 8 hours of direct sunlight for optimal growth.
  • Squash plants thrive best in warm temperatures, ideally in the mid-70s or higher.
  • Soil temperature needs to be warmed to at least 60-degrees Fahrenheit before seeds are sown, or the seeds will not be able to get a good start at germination.
  • If the temperatures are too low, the plants have a potential for stunted or delayed growth.

How to Start Growing Squash in Pots

Squash can be grown successfully in containers & pots if cared for properly and given the ideal growing requirements.  You can find both space-saving bush varieties and vigorous climbers which can grow in a vertical vegetable garden on trellises or allowed to spill over their pots.

  • Select a container that has drainage holes.
  • Ensure that you have a nice large pot or growing container full of rich potting mix and water regularly.
  • You can provide a trellis and grow vining plants vertically.
  • Plant a bush variety for a more compact habit.
  • Allow the plants to overflow out of the container if you have space for them to spread.
  • You can best control the soil quality of your garden in containers & pots, and your plants and seeds will stay warmer earlier in the season than if they are planted in the ground.
Green Squash

Planting Squash Seeds in Containers

Squash roots do not prefer to be transplanted, so it is best to sow seeds directly into the container or pot. Plant seeds in mid-spring after the soil warms up, approximately two weeks after the possibility of frost.

If you do want to get a head start on your plantings, consider planting your seeds indoors in biodegradable pots, 3-4 weeks before the last frost. The use of biodegradable pots allows you to plant the whole pot directly into the soil so that the roots can remain intact.

Fertilizing Squash in Pots

Squash plants draw their nutrients from the soil in containers to grow, so they can benefit from fertilization approximately six weeks after the seeds are planted. When growing squash in containers & pots, amend the soil around squash plants with worm castings, well-decomposed compost, or use a high phosphorous and calcium fertilizer, which will best promote fruit production and help ward off diseases like blossom rot.

The Best Way to Water Squash Plants

Squash plants should receive 1 inch of water per week. It is vital to supply plants with sufficient hydration, especially during their budding and fruiting phases. You can provide additional water retention in your garden by adding 2-3 inches of organic mulch around the base of established plants when growing squash in containers & pots.

  • Water the soil rather than the plant to ward off fungal disease.
  • Water in the morning, so the plant has plenty of time for the sun to dry its foliage and so that the large plant has the best chance of hydrating before the sun is too hot.

Common Squash Plant Pests & Disease

Growing squash in containers & pots is relatively easy, but you may have to battle some pests and diseases along the way. You can ward off disease and control pests organically by ensuring that your soil is rich in organic material, ensuring your plants have good air circulation and proper watering.

With all pests and diseases, it is crucial to keep a watchful eye on your plants and take action if you see any signs of damage.

  • Squash Vine Borers and Cucumber Beetles: Squash Vine Borers and Cucumber Beetles are problematic nemeses of squash and zucchini plants. Keep a close eye for visible bugs and damage to vines. If they get the chance to burrow into your vines, it can lead to the complete demise of your plants.
  • Blossom Rot: Blossom rot can be prevented by ensuring that the soil is calcium-rich. You can test your soil and amend it accordingly.
  • Powdery Mildew: Powdery mildew on plants can spread quickly and decimate the garden if not caught and treated early. It can usually be prevented through proper spacing, which encourages sufficient airflow, and by watering early morning, which prevents leaves from staying saturated for extended periods.
Ripe Pattypan Squash

Recommended Varieties for Container Squash

Squash plants come in a lot of different varieties that make planting exciting, from vibrant colors and patterns to a vast array of unique shapes and sizes. You can also choose between space-saving bush varieties and meandering vines.

Try some of these easy-to-grow and diverse types in your garden this season:

  • ‘Summer Squash-Golden Zebra Hybrid’
  • ‘Summer Squash-Gourmet Gold’
  • ‘Scalloped Patty-Pan Squash’
  • ‘Winter Squash-Spaghetti’
  • ‘Summer Squash-Golden Goose Hybrid’
  • ‘Winter Squash-Delicata’
  • ‘Winter Squash-Butternut’

How to Grow Squash in Pots & Containers

It is important to note that squash plants require pollination to produce a robust yield. Squash plants grow both female and male flowers, and they both need to be visited regularly by pollinators like bees and other beneficial insects to produce fruit. It is a great idea to companion plant some flowering annuals and herbs nearby to attract pollinators to your vegetable garden.

Squash plants are abundant producers of fruits, and they grow rapidly. Check your garden daily once the plants start offering fruit to keep up with your fast-growing crop. Harvest young fruits that are at least 4-6 inches long for the best flavor and most tender veggies.  Implementing these tips should give you an abundance that you can use, can, store, and even share with friends!

Looking to add squash to your food palate this season? Get everything you need to successfully grow squash by using the Kellogg Garden Products store locator! 

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