How To Support Sweet Peas

One of the best plants for cutting, sweet peas (officially known as Lathyrus odoratus) offer tempting colors and aroma for spring and early summer bouquets. The tiny flowers emit a grape-like fragrance into the air and come in a variety of beautiful colors. We enlisted the assistance of Barb Pierson, our nursery manager, to provide some guidance for individuals who have never grown Sweet Peas in a garden or a container pot. Any beginner or green thumb can benefit from a plentiful supply of these lovely flowers thanks to her advice.

Why do people grow Sweet Peas?

Sweet peas are cultivated for their lovely, ruffled blossoms, which come in pastel, blue, and bicolor hues. They are a beautiful cut flower since many types have scented blooms. The cultivation and breeding of sweet peas for both the home grower and the florist industry has a long history.

How do I go about growing Sweet Peas?

Sweet peas can be grown from seed that is treated before sowing or, more conveniently, from a starting plant. At White Flower Farm, we plant three seeds in each pot to create three Sweet Pea vines.

Where do I plant them and when?

In the northern half of the US, sweet peas flourish in the full sun. They can benefit from afternoon shade in the South. They are planted as early as possible in the spring since they prefer mild temperatures and cool roots. Newly planted seedlings will not be harmed by a mild cold. They can be sown in the fall and cultivated through the winter and early spring in highly warm climates. Compost should be added to the soil, and the area should be well-drained for optimal results. Sweet peas can be successfully grown in raised beds.

Do they need any special care while they are growing?

Sweet peas require support to grow and flower because they are climbing plants. Many other kinds of structures, like a trellis, supports made of mesh or wire, or fences, can be used. To sustain the weight of the vines, they require a sturdy framework that is firmly planted in the ground. The vegetation will develop tendrils that encircle the support you offer.

Since they like nutrient-rich soil, adding compost at planting time is advised. Mulching Sweet Peas will keep the roots cool and help them retain moisture as they grow.

Pinch the growth tips by one after the plants have reached a height of around six to encourage branching and the development of extra flowering stems.

What are the most common mistakes that people make with Sweet Peas?

planting them in the middle of the summer They dislike the heat and won’t blossom as frequently.
not offering assistance when planting. Once the plants have begun to grow, it is challenging to install your trellis or support.
Lack of compost or fertilizer will cause weak plants and fewer flowers in poor soil.
If Sweet Peas are planted too closely together without being thinned out, powdery mildew can grow and crowding lowers bloom production.

Do Sweet Peas produce pods that you can eat like the ones you find in the grocery store?

Despite having the appearance of snap pea pods, the seed pods are not edible. The pods and seeds can be saved in order to grow plants the following year. Remember that the plants that the seeds may grow may not be the same hue as the parent plant.

Will the plants come back again next year?

The plants are typically not winter hardy in most areas. They are replanted with new seed and plants even in warm climates to produce the most flowers and have robust development.

When do they bloom? Are there tips for getting extra blossoms?

Sweet peas will begin to blossom 4 to 6 weeks after they begin to show apparent vining. Whether or not the plants have been pulled back will affect the timing of the bloom. Although pinching may slightly limit growth, it will result in bushier plants with more flowers. In the spring and early summer, sweet peas will grow and bloom more quickly as the days lengthen. Compost or old dry manure can aid to supply nutrients for the growth of huge, many blooms. A fertilizer with a phosphorus to nitrogen ratio greater than one can also increase flower production.

What is the process for cutting the blooms?

Cut the blossoms early in the day to prevent the sun from drying them off. For your vase, select newly opened flowers with the longest stems. Just the side flowering stems of the plant should be clipped; leave the main stem alone.

Why should I get my Sweet Peas from White Flower Farm?

No seed treatment or waiting for germination is necessary because our plants are grown in our greenhouses in the spring and supplied to you at the ideal time for planting in your region. Our sweet peas arrive completely rooted and ready to plant in the ground in 4 pots, each containing 3 seedlings. You can avoid the time and hassle of starting sweet peas from seed by doing this. The quickest way to enjoy these fragrant flowers outdoors and in vases inside your home is to purchase and plant our Sweet Pea seedlings.

fertilising

Every few weeks, fertilize your sweet pea plants with a normal fertilizer or add comfrey pellets. The best tomato feed is one high in potash. The sweet peas can continue to grow until August if you follow a good watering and feeding schedule.

staking

Sweet pea plants frequently grow to heights of over 1.8 meters (6 feet), thus they require vertical support and a frame to clamber and climb over. The best option is a teepee or arch, which you can either buy ready-made or create yourself.

Tie the young sweet pea plants to the vertical support as they start to grow. It’s crucial to routinely tie in your sweet peas because doing so will encourage faster growth and healthier plants. When they start to run off, repeat this more frequently after the first two times in the first month.

To ensure that they are growing vertically, we typically tie in our sweet peas every seven to ten days, and perhaps even more depending on the season.

deadheading

Your sweet peas need to be deadheaded on a regular basis. Watch for seed pods to develop and cut them off as needed. As a result, the plants are unable to produce seeds, which would otherwise prohibit them from blooming.

You should remove all the curled stems and tendrils, professional gardeners who will be competing in horticulture exhibits will advise you. They connect to flower stems and bend them into curves by drawing energy from the blossoms. If you are cultivating a lot of sweet peas, it takes a lot of work. I make an effort to get rid of any I spot as I select, but I don’t become distracted.

propagating

At the conclusion of the season, if you still have any seed pods, you can harvest the seeds, place them in a labeled envelope, and let them dry for about a month. When ready to plant in the winter, put in a paper bag in a container in the refrigerator. If you grew a variety of plants, the offspring may differ slightly from the parents.

What kind of support works best for peas?

Using items you already own to support pea plants is the most affordable and frequently effective option.

Small branches that have fallen from forest trees, an old PVC pipe, or any robust wooden stake between 4 and 10 feet long can be used as stakes in the ground (1.2 to 3 m.). Stakes should be placed every few feet behind your peas, and their middles and tops should be covered with a thick cotton rope. The string works well as a support for pea plants. The stakes can have some vines clinging to them.
Another way to support pea plants is with chicken wire or old farm fencing. Place the fence in a place where peas in growth can easily access it.
Another method of supporting pea plants uses nylon mesh that is fastened to posts.
The wooden trellis-like construction is a way to stake peas in the garden, but it might be more durable than other ways to support pea plants. You should plant pea plants in a new location every year, so you might want to utilize a more portable method of staking them in the garden. Plant additional vining crops there when rotating the peas each year if you want a permanent trellis to enhance the appearance of the food garden.
Peas can be staked in the ground using metal rods in a garden. To support pea plants, a straight, fence-like structure can be built.
An appealing approach to stake peas in the yard is using a trellis that resembles a teepee. Occasionally, the blooms of pea plants in growth are pretty, so they can serve as an additional way of staking peas in the garden.

How are sweet peas trellised?

Sweet peas can be seeded in the fall in warmer places (Zone 7 and above) where the winters are generally not too harsh. Other than that, plant seeds in late winter or early spring. Before planting, give the seeds a 24-hour soak in water. By doing so, the seed coat is softer and the sprouting process is accelerated.
Fill your planting containers with high-quality potting soil while the seeds are soaking. Use the deepest pots you can find because sweet peas develop a lot of roots. Ideal containers are 4-inch (10-cm) pots and root trainers.
In each container, plant two seeds by pressing a fingertip into the soil and a half-inch (1.25 cm) deep.
To boost humidity and hasten germination, cover pots with a plastic dome covering. Place in a warm greenhouse or a house window with good light.
Pinch out the center growth tip, just above a leaf joint, once plants are 4 to 6 inches (10 to 15 cm) tall, leaving just two or three leaf nodes. The plant will be encouraged to branch out strongly from the base as a result.
Because they use a lot of food, sweet peas need a little more care to produce in large quantities. Apply bone meal, a thick layer of compost or well-rotted manure, and a generous amount of natural fertilizer to planting beds to prepare them. Incorporate these elements thoroughly into the soil.
Vines require a sturdy foundation to climb and grow quickly. Affix Hortonova netting or 6-foot (1.8 m) tall metal fence to the tall poles spaced approximately 8 feet (2.4 m) apart down the row for them to climb.
Around the time of the final spring frost, plant seedlings outdoors in two rows, one on either side of the trellis, spaced approximately 8 inches (20 cm) apart down the row. It’s crucial to keep the vines bound to their supports as they erupt into lush growth. Sweet peas can grow more than a foot (30.5 cm) per week once the vines begin going.
Sweet peas adore water, and they can’t survive without regular watering. Set up soaker hoses as soon as you plant them to prevent their luxuriant development from being restrained. It’s important to maintain their thirst quenched during warm weather. Use diluted fish and seaweed emulsion to feed plants once a week.
Pick flowers when there are at least two unopened blooms remaining on the stem for the greatest vase life. To extend the life of the vase, add flower food to the water. It’s crucial to prevent plants from going to seed in order to prolong blooming, so be sure to regularly harvest and deadhead the flowers.

Should sweet peas be tied off?

Sweet peas are ideal for picking, are simple to grow, and come in a variety of lovely colors. They can be grown in the ground or in pots, trained up a frame for a lovely show. If you want to enjoy the scent of sweet peas while relaxing in the yard, plant them close to a seating area. Or choose some for the vase—even a tiny quantity may make a space smell good.

How to grow sweet peas at home

Sow sweet pea seeds in the spring or autumn. Pinch out the tops of plants when they are 10 cm tall to promote bushy growth. Mid-spring is a good time to plant, and water frequently. The tendrils on the majority of kinds “self-cling” to supports, however certain sweet pea varieties require tying in.

When flower buds start to develop, begin fertilizing sweet peas with a high potash fertilizer (like tomato food). Continue choosing those blooms for the vase because frequent picking fosters the formation of new blossoms.

Do sweet pea roots require training?

Sweet pea seeds frequently have a tough seed coat, which makes germination more challenging. Simply set the seeds on wet kitchen paper in an airtight container in a warm area to soften the seed covering. They can be seeded as soon as they start to sprout or bulge.

You will require root trainers, which are long, thin pots, to seed the sweet peas. Visiroot 4 Deep Cell Kit from Gro-sure. Deep pots like this are ideal for sweet peas since they tend to establish long roots. Put seed compost, such as Gro-sure Seed & Cutting Compost, in the root trainer. Cover the seeds with compost after planting them about 2 cm deep.

How high should a trellis for sweet peas be?

Sweet peas are one of the few annual flowers with enduring appeal and rural charm. They appear to be the exact opposite of our hurried life as they twine languidly around a rustic trellis. Sweet peas are fantastic flowers for gardens and bouquets thanks to their alluring scent. For information on how to plant and care for sweet peas, read our Sweet Pea Growing Guide!

About Sweet Peas

The sour pea Lathyrus odoratus is an annual flower that looks great twining on a trellis or arch, growing in a cutting garden, border garden, or woods. Today, a wide variety of hues, from pearly white to ice cream pastels to ritzy magentas and inky purples, are available for the blooms.

Only their honey and orange blossom fragrance matches their delicate winged flowers. Their appeal has been ensured by the combination of their exquisite aroma and their capacity to generate a large number of flowers for the house over an extended time of cutting.

One of the keys to cultivating sweet peas is to sow them early. Sweet peas are incredibly tough, despite the way they appear fragile. Plant them in very late winter or early spring in USDA Hardiness Zone 7 or colder, as soon as the soil is dry enough to work with. (Don’t plant seeds after the last frost.

When Dr. Robert Uvedale, a teacher from Enfield, Middlesex, received seeds of this exceedingly fragrant annual in 1699 from a Sicilian monk named Francis Cupani, he brought the first sweet peas to Britain. In North America, they gained enormous popularity as garden plants and cut flowers. By the late 1800s, producers in California, especially W. Atlee Burpee, were exporting trainloads of sweet peas across the nation and creating numerous new varieties.

Some people liken the process of producing sweet peas to that of preparing pie dough. Some individuals are gifted, while others are not. This plant sprouts from large, manageable seeds that resemble peas. They are still rather challenging since they take a while to germinate. It’s worthwhile to experiment with various seeds every year.

When to Plant Sweet Peas

Sweet peas should be planted as soon as the soil is dry enough to work in very late winter or early spring in most places where frosts occur frequently (Zone 7 and colder). (Start sowing before the last frost! Most certainly, it will be too late.)
Plant sweet peas in the late fall (November) if you garden in a region with a mild winter climate (Zones 8, 9, or 10), so they can grow and blossom in the late winter and early spring. Six weeks before you plant the seeds, dig a trench and fill it with compost or well-rotted manure to obtain the greatest show. Sweet peas are gregarious plants that require a lot of nutrient-rich materials to flourish.

Sowing Sweet Peas Indoors

Start sweet peas inside in a seed tray to get a head start on the season in the coldest regions of the nation. Sweet peas can withstand light frosts, so plant out as soon as the soil can be worked in early spring, around 6 to 7 weeks before the last date for frost.
The seeds’ outer layer is softened and helped to germinate by soaking them overnight. Using a nail file to lightly score the outer shell can also be beneficial.
2 seeds to a module is fine to sow the seeds, but keep in mind that their lengthy roots have a propensity to tangle and can make separation challenging. Sow the seeds around half an inch deep in each cell of a seed tray.
Scoop them out gently after they start to sprout their first pea-like leaves and place them in a larger container to harden off. One of the most reputable growers of sweet peas gave me the following piece of advice: “Treat the seedlings like I would treat my husband: put them in an unheated greenhouse, neglect them, and they will thrive.
Plant them outside as soon as the soil can be worked.

Sowing Seeds in the Ground

Sweet peas thrive when their roots are firmly planted in cold, wet soil and their heads are exposed to sunlight. Plant low-growing annuals in front of them if you can to provide shade for the roots.
Pick a spot that drains effectively. If your soil tends to be acidic, it is recommended to add some powdered lime to the surface.
Mix liberal amounts of compost or well-rotted manure into the ground to a depth of two feet to create a rich soil. (Learn more about adding amendments to the soil and getting it ready for planting.)
You should dig a beautiful, deep “compost trench” that is around 4 inches deep before planting.
After digging the trench, use a pencil to cut holes, place the seeds inside, and then press down on the earth to compact it and block out any light.
The seeds should be soaked in water for 24 hours prior to sowing. To hasten sprouting, nick the seeds with a nail file before planting. In a temperate climate, seeds don’t need to be soaked.

How to Grow Sweet Peas

Depending on the soil temperature, germination after planting can take anywhere from 7 to 15 days.
Fill in the trench gradually as the seedlings appear and develop. Hoe additional dirt toward them.
Keep the soil wet. Summer rains may be plentiful. Sweet peas can have bud drop; if you stick your finger into the soil bed to its first joint and the soil is dry, water them at the soil level and do so in the morning.
You won’t need to fertilize if you plant with a lot of compost and aged manure. Use high potash feeds if you do want to supplement the diet because nitrogen feeds promote excessive top development.
Mulch well once plants are planted to keep the soil cool and moist. Unless the soil becomes dry, you might not need to water your sweet peas if you mulch.
Pinch off the tops when plants are 6 inches tall, not sooner, as this will promote the production of side shoots too early.

Provide Supports

When temperatures rise above 65°F, sweet peas will begin to fade since they like chilly days and nights.
Sweet peas are true climbers, with the exception of the bush forms. Provide them with sufficient support for at least 6 feet. Some species can reach heights of nine or ten feet. A braided willow obelisk, bamboo poles in the tee-pee design, or a trellis are examples of other attractive supports. If you don’t have a fence or trellis, give them something to cling on, such chicken wire, bushy twigs, or brush.
Give the plants a good start by tying the first few stems to the support; the rest will follow. When they reach a height of 4 to 8 inches, use your thumb and forefinger to pinch out the middle growing point. Plants will grow stronger as a result.