Trellising squash not only looks amazing, it’s also a great space saver. In this post, I’ll show you exactly how to grow squash vertically, give you tips and techniques for training squash vines, tell you the best types of climbing squash to grow, and how to choose the right plant supports for them.
Even so, some people are too nervous to grow squash vertically because they worry the vines are too large and heavy. But the good news is that any type of climbing squash plant can be grown vertically!
Growing squash on a trellis or other vertical structure helps to keep this bully from taking over your vegetable garden. And that means that even those of us with small garden plots can grow squash!
Trellising squash makes controlling the unruly vines super easy, and it looks pretty amazing too. These fast-growing climbers will quickly cover a vertical structure, and the squash look so cool hanging down.
Here’s what you’ll find in this guide to growing squash vertically. Click the links to skip to the section you’re most interested in. Or keep reading to learn everything you need to know to successfully trellis squash in your garden!
- Is Squash A Vine Plant?
- Does Squash Need To Be Grown Vertically?
- Growing Squash Vertically
- Choosing Supports For Trellising Squash
- How To Grow Squash Vertically
Is Squash A Vine Plant?
Before you decide whether growing squash vertically is something you want to try in your garden, it’s important to understand that not all types of squash will make good trellis plants.
Very broadly, there are two different types of squash plants: vining varieties and bush varieties. Vine squash varieties will grow on a trellis, and bush types (sometimes called patio plants) will not.
So, it doesn’t matter whether you want to grow summer squash or winter squash, pumpkins or gourds. From butternut to spaghetti, kabocha to acorn – any kind of squash can be grown vertically as long as it’s a vining variety.
Does Squash Need To Be Grown Vertically?
No, squash does not need to be trellised. Climbing squash varieties will grow just fine along the ground without any support, and many gardeners grow them that way.
However, most vining squash grow very large, and can take over the garden pretty quickly. Trellising squash is the best way to contain these large vines, and keep them from growing wild.
Growing Squash Vertically
Any type of vining squash can be grown vertically. But it’s important to keep in mind that the largest climbing squash varieties (like huge pumpkins and gourds) grow very long and heavy.
In fact, some of these giant vines grow so large that farmers have found pumpkins growing in the tops of trees! So be sure you know how tall the plants will grow before you start planning your vertical squash garden.
Those monster vines I mentioned are not very practical for vertical gardening, and are best grown in large garden plots or farm fields.
Benefits Of Growing Squash On A Trellis
Not only does it look gorgeous to trellis squash, it’s also beneficial for the plants and your crop. Getting the vines and fruit up off the ground can protect them from pests and disease issues.
Squash sitting on the ground can easily be eaten by bugs or animals. Plus, when soil splashes up on the leaves, it causes problems with fungus and disease.
Trellising squash also means your crops will be cleaner, and they won’t have an ugly yellow spot on them (which is what happens when squash lays on the ground).
Best Types Of Squash To Grow Vertically
Like I mentioned above, there are two basic types of squash plants: vining varieties that will grow on a trellis, and bush varieties that won’t.
By now you may be wondering how the heck can you tell the difference? Well, you can’t tell by just looking at the seeds or the seedlings. So be sure to always check the seed packet or plant tag to know for sure.
Choosing Supports For Trellising Squash
There’s no doubt that trellising squash is not only beneficial, it’s beautiful too! Choosing the right support will not only add an architectural element to your garden, it will ensure your squash will grow safely, and look it’s best.
The most important things to think about when choosing a support for climbing squash are the height and strength of the structure.
Before you decide what type of support to use, you should know how large the squash plants will get in order to pick the perfect vertical growing structure for them.
How Big Do Squash Plants Get?
The height of vining squash plants varies greatly, and it totally depends on the variety you choose to grow. A good rule of thumb to remember is… the smaller the fruit, the shorter the vine.
Squash vines can grow anywhere from 3-4′ long, all the way up to 20+ feet tall. Like I mentioned above, the largest vining squash (like giant pumpkins and gourds) can grow to the tops of trees.
So, always be sure you check the plant tag or seed packet so you know how tall your squash will grow. That way you can pair each type of vine with the perfect growing structure.
Squash Trellis Ideas
Once you know how tall your squash vines will grow, that will make it much easier to choose the right type of growing support for them.
Climbing squash need to be grown on large, strong supports that can handle their weight. The vines will become very heavy once the fruit starts to mature. So, if you plan to grow squash vertically, be sure to use a strong support for it.
How To Grow Squash Vertically
When I talk about trellising squash, one common question I get is “How do squash grow vertically?”. Excellent question!
The vines themselves don’t wrap around the trellis. Squash vines grow side shoots that are called tendrils. It’s these tendrils that will wrap around anything they touch, including a vertical growing support.
A common concern that people have when growing squash on a trellis is that the fruits will grow too large and rip from the vine.
It’s true that large squash hanging down from the plant may need extra support so the weight doesn’t damage the vine.
You can make a hammock out of an old t-shirt or pantyhose, then tie it to the trellis to loosley cradle the dangling squash to support their weight.
In all the years I’ve been growing squash vertically, I’ve never had to give any of the hanging squash any extra support. But it’s definitely something to keep in mind if you plan to grow larger types of squash, like gourds or pumpkins.
How To Trellis Squash Plants
Another common question I get asked is “Do squash plants climb a trellis?“. The short answer is yes, but… in all honestly, squash really aren’t great climbers by themselves.
Gravity is fighting us, and the heavy squash vines prefer to sprawl out horizontally rather than grow vertically (they are a bit lazy that way I guess).
So you will definitely need to train the vines to grow on a vertical structure. Don’t worry, it’s not difficult, it just take a bit of extra planning.
How To Train Squash Vines
To train unruly squash vines, you can simply weave or tuck them into the trellis support as they grow. The tendrils will eventually grab onto the trellis. Be careful though, young vines are very delicate.
Since squash is so heavy, you will likely need to tie the vines to the support. I recommend using plant clips or cut-a-size twist ties since they are easy to remove and reuse. But you could also use flexible plant ties or twine if you prefer.
Just be sure to tie the vines on loosely so they won’t get strangled as they grow thicker. Once the tendrils grab onto the trellis on their own, you can remove the clips or ties and then reuse them to attach the new growth higher up on the trellis.
They grow fast in the heat of summer, so check them every few days and train new growth as needed to keep your squash growing vertically. Get detailed step-by-step instructions for training vines here.
Growing squash vertically is beneficial to the plants and to your garden. Trellising squash means that even gardeners with small spaces can grow these large vines in their garden. Plus, since vertical squash looks so gorgeous, it really makes a statement in the garden!
Want to learn how to grow even more of your vegetables vertically? Then you need my brand new book, Vertical Vegetables: Simple Projects That Deliver More Yield In Less Space! In it you will learn all about vertical vegetable gardening and get detailed step-by-step instructions for nearly two dozen beautiful DIY projects and trellises that you can build! Order your copy today!
Learn more about my new Vertical Vegetables book here.
More Posts About Vertical Gardening
- Growing Cucumbers On A Trellis: How To Grow Cucumbers Vertically
- How To Trellis Peas In Your Garden
- How To Trellis Grapes In Your Home Garden
- The Amazing Benefits Of Vertical Gardening
Share your tips for trellising squash, or tell us how you prefer to grow squash vertically in the comments section below.