
Sweet peas on trellis are a classic combination that can add a touch of whimsy and romance to any garden. They come in a variety of colors and are easy to train up a trellis.
To create a beautiful display, you can use a wooden trellis or a bamboo teepee, both of which provide excellent support for the climbing plants. This is especially true for the 'Cupani's Original' variety, which can grow quite tall.
A trellis also allows you to showcase the delicate, fragrant flowers of sweet peas. The 'Matucana' variety, for example, has a particularly striking bloom with a sweet, honey-like fragrance.
You can also use a trellis to create a sense of height and drama in your garden, making it feel more expansive and interesting. This is especially effective when combined with other climbing plants like clematis or morning glories.
A different take: Sweet Peas Climbing Vines
Choosing the Right Sweet Peas
There are a few points to keep in mind when deciding what type of pea trellis to build.
Sweet peas come in a variety of colors and fragrances, so choose the ones that suit your taste and garden style.
Consider the amount of sunlight your sweet peas will receive, as some varieties require more sunlight than others.
If you want to attract pollinators to your garden, choose sweet peas with strong fragrances.
See what others are reading: List of Award of Garden Merit Sweet Peas
Garden Setup
Before you start growing your sweet peas, you'll want to consider your garden space. How much room do you have for a trellis? If you're growing a row of peas, a narrow width trellis made from upright stakes and nylon netting or plastic netting is a great option.
You can also use a DIY pea trellis made with a sheet of cattle panel or wire panel, perfect for a raised bed garden or a larger space. These tripod-type trellises are made from three or more supports secured at the top, ideal for other vertical vegetables like pole beans and cucumbers.
If you have a lot of space, consider a garden arch or tunnel. These are perfect for climbing peas and can be made using two pieces of 4 by 8 foot cattle panels attached to wooden raised beds with wooden strapping and zip ties.
Support and Pruning
Sweet peas are climbers, and most varieties will reach heights of 8-10 feet. Install sturdy supports like trellises before planting to avoid disturbing their roots later.
You'll want to choose a support that suits your style, such as a trellis, arches, fences, or obelisks. For a different approach, you can grow shorter sweet peas in hanging baskets, letting the vines trail over the sides.
To encourage bushy plants and more flowers, pinch off the top 1-2 inches of growth when the plants have 4-6 leaves. This will help promote new growth and prevent the plants from getting leggy.
Here are some support options:
- Trellis: Buy one or create your own using wood or bamboo stakes.
- Arches: Train your sweet peas to climb over metal or wooden arches.
- Fences: If you have a fence, let your sweet peas climb up it for an easy support system.
- Obelisks: These tall, narrow structures are ideal for vertical growing.
- Hanging Baskets: For a different approach, grow shorter sweet peas (like Knee-Hi or Windowbox) in hanging baskets, letting the vines trail over the sides.
A-Frame
If you're looking for a sturdy support for your sweet peas, consider building an A-frame trellis. This design is perfect for exposed and windy gardens.
You can make an A-frame trellis using lengths of untreated lumber, creating a rectangular frame that's similar to a picture frame. Attach a second frame on the opposite side and connect them at the top with hinges or zip ties.

Mount two short wood planks to the bottom of each side, which will act as stakes and be inserted several inches into the soil. This will provide a solid base for your trellis.
To give your sweet peas something to climb, add netting, lengths of twine, chicken wire, or wire panels to each side of the trellis. You can also use PVC pipes to create an A-frame trellis.
Here are some options to consider for adding support to your A-frame trellis:
- Netting: A great option for sweet peas, as it allows for good air circulation and easy access for harvesting.
- Lengths of twine: A simple and inexpensive option that can be easily removed and reused.
- Chicken wire: A durable option that can withstand windy conditions.
- Wire panels: A sturdy option that can provide excellent support for climbing sweet peas.
Support Your Sweet as They Grow
As sweet peas grow, they need support to thrive. Install sturdy supports like trellises before planting to avoid disturbing their roots later. Guide young plants to the support structure, and they will naturally climb.
Most sweet pea varieties will reach heights of 8-10 feet, so you'll want to choose a support that can handle that. Trellises are a great option, and you can buy one or create your own using wood or bamboo stakes.

If you have a fence, consider letting your sweet peas climb up it for an easy support system. You can also train your sweet peas to climb over metal or wooden arches. For a different approach, grow shorter sweet peas in hanging baskets, letting the vines trail over the sides.
Here are some support options to consider:
- Trellis: Buy one or create your own using wood or bamboo stakes.
- Arches: Train your sweet peas to climb over metal or wooden arches.
- Fences: If you have a fence, let your sweet peas climb up it for an easy support system.
- Obelisks: These tall, narrow structures are ideal for vertical growing.
- Hanging Baskets: For a different approach, grow shorter sweet peas in hanging baskets, letting the vines trail over the sides.
Remember to space your vertical posts 4 feet apart when using the posts and netting method to avoid the trellis slumping under the weight of the growing plants.
Growing and Harvesting
To keep your sweet peas blooming beautifully, deadhead regularly to encourage new flowers. This means removing fading blooms to prevent them from developing into seeds.
Consistent watering is also crucial, as sweet peas prefer moist but well-draining soil. Keep the soil hydrated, especially during dry spells.
Fertilizing your sweet peas every 3-4 weeks with a fruit and flower fertilizer will help keep the blooms coming. This will provide them with the necessary nutrients to produce more flowers.
In hot climates, it's essential to keep the roots of your sweet peas cool. Mulching around the base of the plants will help retain moisture and keep the roots at a comfortable temperature.
Providing support for your sweet peas as they grow is also vital. This will prevent tangling and encourage more blooms. Consider using a trellis or other support system to keep your plants upright and thriving.
Here are some key tips to keep in mind:
- Deadhead regularly to encourage new flowers.
- Water consistently to keep the soil moist but well-draining.
- Fertilize every 3-4 weeks with a fruit and flower fertilizer.
- Keep the roots cool in hot climates by mulching around the base.
- Provide support as the plants grow to prevent tangling and encourage more blooms.
Creative Ideas
You can get really creative with your DIY pea trellis. Using old materials is a great way to recycle items you may have on hand.
There are plenty of options to choose from, like a tomato cage or a ladder. You can even use the center supports of an old patio or beach umbrella.
If you're looking for some inspiration, here are some ideas to consider:
- A tomato cage is a great option for a DIY pea trellis.
- A ladder can provide a sturdy base for your pea plants to climb.
- The center supports of an old patio or beach umbrella can add some unique character to your trellis.
Planting and Seasonal Tips
Sweet peas can be sown into small pots of compost in autumn and overwintered indoors, or planted directly into the ground come spring.
The Northeast's warm weather is ideal for planting sweet peas, and with the right conditions, they'll produce beautiful blooms with an amazing scent.
Sweet pea seeds can be obtained from reputable seed suppliers like Johnny's Selected Seeds.
Planting sweet peas along a trellis in the vegetable garden will give you lots of fragrant color this summer.
Don't forget to provide your sweet peas with a trellis to climb on, just like Ryan did at the farm.
Check this out: Companion Planting Sweet Peas
Frequently Asked Questions
What is the secret to growing sweet peas?
Sweet peas thrive in cool, moist environments, typically doing best in spring and early summer. Optimal planting times vary by climate, but generally, they flourish in temperatures between 40°F to 70°F (4°C to 21°C)
What happens if you don't trellis peas?
If you don't trellis peas, they'll end up on the ground, making them vulnerable to pests and difficult to access. Trellising keeps them at a safe height for easy harvesting and pest protection.
What is the best climbing support for sweet peas?
For sweet peas, a wigwam made of bamboo canes is a great climbing support option, allowing them to grow up to 2m in height.
How tall of a trellis do sweet peas need?
Sweet peas need a trellis that's at least 6 feet high to provide support for their climbing growth.
What is the best month to plant sweet peas?
The best time to plant sweet peas is between January and April, or in autumn from October to mid-November. Planting in the winter months can be a great way to get a head start on the growing season.
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