Although Lathyrus odoratus, the most popular sweet pea variety, is an annual, there are also perennial forms available (Lathyrus latifolius).
- 1. Annual sweet peas are plants that go through their entire life cycle in a single growing season. They grow, produce seeds, and perish within the span of a year, just like other annual crops. The next year, you must replant new plants in your garden if you want to grow them again. The majority of sweet pea species are annuals.
- 2. Perennial sweet peas: These flowers reappear each year. After the growth season is over, you don’t need to replant them because they will keep growing for a longer period of time. Although there are fewer types of perennial sweet peas available and they tend to lack the traditional sweet pea aroma, they may be simpler to grow.
Do sweet peas reproduce on their own?
Although sweet peas can be grown in pots or hanging baskets, a larger in-ground growing area is typically preferable. These plants want lots of space both in breadth and depth because the size of the blossoms is inversely proportional to the size of the roots.
It is advised to use containers that are at least 18 inches deep because lesser sizes can stunt growth. Use smaller containers if you don’t care about this. In either case, the blossoms are lovely. Just make sure to water them regularly to prevent drying out.
Look for sweet pea seeds that are advertised as being suitable for container growth.
In a warmer climate, yes. It is definitely feasible for some sweet pea plants to self-seed the next year if you allow them to go to seed in the fall and let the seed pods burst open and release the seeds. This is known to occur in zones 7 or warmer. If the seed does not freeze throughout the winter, it might also occur in regions with lower temperatures.
With pinching back (selectively removing the tips of major stems) and deadheading (removing dead blooms and their stalks), sweet peas will grow more profusely, although it’s completely optional.
At the time of planting, install the trellis or arch. Make sure the plants are getting hold of the supports and nicely covering the trellis by checking on them every few days.
Yes. Pods will develop once the blooms have finished blooming. These pods will contain seedlings. When they are brown and dried and the pods are just beginning to open, they are suitable for harvesting.
Yes. The secret is to select sweet peas when the blossoms at the stem’s top are still closed. Make a precise incision through the stem. Put the freshly cut flower right into a vase filled with room temperature water and cut flower preserver. In a vase, they typically last for 4 to 5 days.
Sweet peas are perennial flowers.
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.
Picking Flowers
- Pick flowers frequently for bouquets so that the plant will focus its energy on producing additional blooms rather than seeds. Up until the first frosts, the more you pick, the more they produce.
- Allow a couple of the final blossoms to mature into seedpods when the leaves begin to lose their color. On a windowsill, dry them, and then keep in an envelope in a dry location to sow the following year.
From miniature bedding kinds ideal for pots and borders without support to 8-foot-plus scramblers, there are sweet pea varieties for every setting.
These decorative peas are native to Sicily, where they have flimsy stems and a powerful orange-jasmine-honey aroma. Modern hybrids feature larger blooms and stronger stalks.
However, some of these contemporary kinds, despite having larger blossoms and more fashionable colors, lack the earlier sweet peas’ perfume. Sweet pea ‘Cupani’ is still rightfully well-liked and simple to grow. It has bi-colored flowers with maroon upper petals and violet “wings.”
The decadently fragrant “America” is an antique from 1896. When its petals open, beautiful red and white wavy stripes are revealed.
Look for antiques like the Sicilian “Old Spice” collection. Shades of white, cream, pink, lavender, and purple can be seen in this strain’s blossoms.
A new cultivar with enormous, creamy-yellow blooms with violet shading called “April in Paris” is aromatic.
Although the ordinary sweet pea is an annual, Lathyrus latiflolius, a perennial broad-leaved everlasting pea, is not fragrant. These clambering plants have a height of up to 6 or 7 feet, are hardy to zone 5, require little care, and bloom continuously from year to year.
- An essential component of a late Victorian garden is the sweet pea. Because of their wide range of colors and aroma, Victorians adored sweet peas.
- When the dew is still on the flowers in the morning, gather them. Their best aroma is at this time.
Peas are either annual or perennial.
The majority of legumes produced in backyard gardens, such as beans and peas, are annual plants, meaning they go through their entire life cycle in a single year. On the other side, perennial legumes are ones that can survive for more than two years.
When do sweet peas bloom?
I grew up spending a lot of time with my great-grandparents and summers in the country. I had the responsibility of keeping fresh flowers on my Grammy’s nightstand. She had many lovely flowers blooming in her garden, but the one I most vividly recall is the tangle of rainbow-colored sweet peas clinging to the posts of her carport.
I immediately planted a giant tunnel of sweet peas in the middle of the garden after we purchased our first home. I was transported back in time to the summers of my youth and the pleasant recollections of collecting flowers in Grammy’s garden as the first blooms bloomed that spring.
I’ve grown and tested close to a hundred different sweet pea varieties over the years, including both heirloom and hybrid varieties, in a number of studies I’ve carried out over the years. Even while they have all been lovely, I do have a few favorites and a small number of them that I simply cannot live without.
Sweet peas can be planted in the fall in warmer climates (zones 7 and higher), 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. See our resource, How to Grow Sweet Peas, for further information on seed sowing.
It might be challenging to keep up with the harvest once the vines start to produce blossoms. To catch blooms at their peak, I comb the rows every other morning.
Choose stems with at least two unopened flowers at the tip for the best vase life. Although they can be chosen when more open, they won’t last as long in the vase. Sweet peas only endure 4 to 5 days in a vase, making them a transient cut flower. A few extra days can be added by sweetening the water or adding a floral preservative.
Please be aware that sweet pea seeds are toxic if consumed, unlike garden pea seeds. Be cautious when around kids and animals.
WHITE ‘Memorial Flight’ (seen above, left) is one of the most fragrant whites we grow and has enormous, ruffled, creamy-white flowers with a green undertone. outstanding for wedding work.
‘White Frills’ (upper middle) is a dependable performer and one of the best whites you can grow. It has thick, robust leaves and a powerful growth habit. Large, pure white flowers with ruffles with a strong fragrance. Real workhorse in the garden!
One of the best varieties available, “Jilly” (above right) is a wonderful shade of smooth cream and has won multiple prizes for good cause. It makes a great cut flower due to its long, sturdy stems and amazing aroma. Blush-pink blossoms with delicate blush-pink edges adorn tall, sturdy stems of BLUSH PINK ‘Anniversary’ (shown above left).
‘High Society’ (upper middle) is one of our most fragrant types and has a charming feminine aspect. Warm candy pink lines the edges of creamy blossoms. outstanding for wedding work.
The ‘Pearl Anniversary’ flower (above right) has creamy white petals with streaks of cerise-pink. incredibly good for wedding work. Unfortunately, this variety did not yield enough seed for the 2020 growing season; but, we are happy to provide it for the 2021 growing season. VERY PINK ‘Daily Mail’ (seen in the image above left) is a show-stopper with big, vivid cerise-pink blooms perched on long, sturdy stems. excellent for trimming
The lovely, classic variety “Carlotta” (upper middle) has endured the test of time. In both the garden and the vase, its vivid carmine-pink blossoms are striking. It’s a tremendous winner thanks to its long stems and powerful aroma.
“Dynasty” (top right) is a hardy grower and an excellent cut flower all around, with bright, hot pink blossoms on long, sturdy stems. It has a cream bottom with paler upper buds, giving it a three-dimensional appearance. A true success!
A new favorite, PEACH/CHAMPAGNE ‘Piggy Sue’ (seen above, left), has stunning colors and glows in the garden. It has a vintage, romantic atmosphere because to its strongly perfumed, cream-colored petals that are delicately edged in blush.
The long-stemmed, sweetly fragrant beauty ‘Castlewellan’ (above center) is a new favorite. It has enormous, bright peachy-pink blooms with creamy undertones. It’s perfect for wedding décor because of its gentle appearance. An essential!
On long, sturdy branches, ‘Marjorie Carrier’ (above right) bears the most exquisite big, ruffled salmon-pink blooms. It is a floral arranger’s delight because to its stunning colour and pleasant aroma.
Dr. Keith Hammett’s new variety “Bix” (seen above, left) has a classic appeal. One of the first types to bloom, the blooms are cream in color with an apricot-pink tinge. Average bloom count is five on tall, profusion-filled stems. a wonderful selection for bridal bouquets.
The softest peachy-pink blush surrounds the outside border of the ‘Jill Walton’ (above center) flower’s enormous, creamy, ruffled flowers, giving them an ultra-feminine appearance. one of our five most preferred types.
‘Mollie Rilstone’ (top right) is one of our farm’s all-time favorites and a sure thing. The most delicate apricot-pink lines the edges of the very fragrant, cream-colored blooms. Flowers of this cultivar fade to a bright cream, giving it an old-fashioned, Victorian appearance. incredibly well-liked for weddings. CORAL/ORANGE One of our all-time favorite varieties is “Geoff Hughes” (shown above on the left). This sweet pea with big flowers has cream blossoms with coral streaks. abundant flowering and excellent cutting qualities.
Beautiful new variety ‘Edith Flanagan’ (upper center) was bred by Andrew Beane. On its long, sturdy stems, it features enormous coral flowers. It’s a terrific winner thanks to its wonderful aroma and eye-catching colors.
The huge brilliant coral blossoms of the cultivar “Florencecourt” (upper right) fade to white in the center, giving them a three-dimensional appearance. A true victor!
The attractive variety “Happy Birthday” (seen above on the left) has eye-catching orange-red petals with a white throat. It’s perfect for cutting because the flowers are supported by tall, sturdy stems.
The name “Raspberry Flake” (upper center) is appropriate for this type that attracts attention. Flowers painted in cream with rich, almost metallic raspberry streaking. No two flowers are the same because saturation levels vary.
The jovial flowers of ‘Restormel’ (above right) almost appear to shine at night. We are reminded of maraschino cherries with warm coral-red blossoms that nearly appear manufactured. Our all-time favorite is this aromatic variety. An essential! PURPLE Dr. Keith Hammett created the beautiful tricolor variety “Enchante,” which is a brilliant combination of cherry pink, white, and lavender. At Floret, people affectionately refer to it as the “unicorn sweet pea. It is very wonderful and is high on our list of plants we must grow.
One of my all-time favorites, “Erewhon” (upper center), is a reverse bicolor with delicate pink standard petals and a dark lavender-blue rim. It has tall, robust stems and is excellent for cutting. An essential!
Dr. Keith Hammett’s spectacular bloomer “Blue Shift” (above right) changes from mauve-pink to an iridescent blue-turquoise as it ages. Nothing else on the market is like it. Despite testing hundreds of different variations, “Nimbus” (seen above on the left) remains one of my personal favorites and the greatest flake variety on the market. Dark eggplant-colored edges and deeply streaked inky gray flowers. A great topic of discussion for everyone who comes to the farm. You are in for a wonderful treat if you haven’t yet grown this beauty!
The novelty variety “Sir Jimmy Shand” (upper center), with its white blooms striped with vibrant lilac, has become a fan favorite. This cut flower has tall stems and a great scent.
If you love purple, you must grow “Richard & Judy” (top right), a long-stemmed, intensely fragrant cultivar. Warm, multi-dimensional flowers with a grape hue sparkle in the garden. Outstanding among the sweet pea varieties! MAROON The must-grow variety “Suzy Z” (seen above, left) has a beautiful metallic gray base with rich maroon veining. Similar to the perennially well-liked “Nimbus,” but more chocolate-maroon in hue.
Dr. Keith Hammett developed the distinctive brown-red flaked type known as “Chocolate Flake” (upper center), which appears to have been coated with cocoa powder.
‘Windsor’ (above right) is a stunning plant in the garden with warm, cocoa maroon blooms that really make a statement. It’s a great kind for cutting because the flowers have a rich fragrance and are supported by long, sturdy stems.
Your knowledge of sweet peas would be very interesting to me. Do you plant them or have any plans to include them in your garden this year? If so, which varieties are your favorites?
Please take note that we have a spam filter that demands us approve most comments before they are published, so if you leave a remark and it doesn’t appear right away, please be patient.
Finally, if you find this information useful, please spread the word to your friends.
