Choosing sweet peas for summer while it’s dark and gloomy outside gives you a good injection of hope since they have a pop of pink, a frilly edge, and a pure white bloom against a brilliant blue sky. Consider vases full of exquisitely perfumed flowers for just a few pounds of seed.
The greatest sweet peas, according to myth, are sown in December to give them time to establish roots while the winter’s chill maintains the top growth robust. But I’ve discovered that sowing in early February and January produces similarly nice results. Sweet pea seeds planted right now will require protection, whether it be a cold greenhouse, a plastic patio type greenhouse, a cold frame, a cold front porch, or a protected balcony. The plants cannot be kept below 5°C, therefore you must keep the harshest frost off of them. However, once the seedlings are established, they should be maintained cool to prevent sideshooting, which results in bushier growth and more flowers.
The longer the single root can extend before it hits the bottom of the pot and begins branching, the happier the plant will be. They are therefore planted in larger pots, known as long toms in the past; the contemporary counterpart is a deep root trainer made of reusable plastic. These are excellent investments. As an alternative, you can plant the entire contraption in spring with one seed inside a toilet paper tube; the cardboard will decompose. If you just have a tiny amount of room, plant the seeds tightly in a small seed tray and transplant the seedlings as soon as they are big enough to handle.
Seeds germinate best at 10C, so sow them on a warm windowsill. Make sure to use an excellent peat-free multipurpose compost and to cover the seeds with a thin layer of it (5 mm) after sowing. Just set the pot in a tray of water and don’t press the compost down. Wait to water again until your seeds start to sprout. Move the plants outside as soon as the first shoots appear to prevent them from growing lanky. Other than watering, there isn’t much to worry about besides slugs and mice. You should have a lot of blooms by June if you plant in the spring after all likelihood of harsh frost has passed.
Roger Parsons Sweet Peas provides great value and a great variety combination. For the best blooms for the garden, choose the Old-Fashioned Mixture; if you want cuttings for vases, use the Semi-Grandiflora Mixture or the Paintbox Mixture. If you have room for just one, Matucana, a wild sweet pea that was imported to the UK from Sicily in 1699, has to be it. It has the most wonderful aroma and lovely magenta and purple blossoms.
When do you plant sweet peas in the garden?
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 method to enjoy these beautiful flowers outdoors and in vases within your house is to purchase and plant our Sweet Pea seedlings.
Do sweet pea seeds need to be soaked?
To aid in seed germination, many individuals advise soaking seeds overnight before sowing. This is due to the hard outer shell of some types. Others, though, contend that soaking might make plants weaker.
However, you might try slightly shattering the seed’s outer shell right before sowing if you’ve previously had difficulties getting the seeds to germinate.
On the side opposite the seed’s black “eye” or scar, carefully nick the shell with a sharp knife or rub it with sandpaper.
How are sweet pea seeds sown?
To make a deep, narrow root run, some gardeners sow their seeds in toilet paper rolls.
Sweet peas are really simple to grow from seed. In the fall, you can sow them into compost pots and grow the young plants through the winter in a cold frame or chilly greenhouse. Alternatively, you can wait until spring to plant seeds in the ground or in pots.
The seeds should be prepared by leaving them on wet paper towels until they expand or sprout. The kitchen roll should be laid out in a sealed container and kept in a warm area. Although it expedites the process, moist soil will still allow your seeds to germinate successfully. In a pot, scatter a number of sweet pea seeds using high-quality compost. They should be buried about 1 cm deep, covered with compost, and well-watered.
Choose a tall container to give your sweet peas a strong start because they perform best when their roots are made to grow in a deep, narrow channel.
Does cold help sweet peas germinate?
Sweet peas germinate quickly and easily; although a little heat helps hasten the process, it is not necessary. Sweet peas can be germinated at a temperature of approximately 15C/59F on a warm windowsill, in a conservatory, or in a heated propagator. Sweet peas planted in the fall will germinate in a lean-to or greenhouse without additional heat. The choice of container is crucial when growing Sweet Peas from seed. Sweet peas have long roots, just like many legumes like peas and beans, thus it’s crucial to put them in a deep container rather than a conventional pot to allow for a lengthy root run.
You can use either the root trainers, which are available at all garden centers, or the less expensive and equally simple toilet roll holders, both of which are shown in the image. Autumn sweet peas are best sown in root trainers if you want them to survive the winter because there is a chance that the cardboard tubes will become wet, break down, and/or promote mold growth. The cardboard tubes work equally well for a sweet pea sowing in the spring. Just be careful not to wet the tube when watering.
How long does it take for the seeds of sweet peas to sprout?
To avoid mildew, sweet peas require a location in full sun, rich soil that drains very well, and sufficient air circulation. Increased organic material must be worked into clay-rich soil in order to improve drainage. Consider using raised beds for successful results if the soil is excessively wet.
If you are aware that summer heatwaves can come on suddenly, plant your sweet pea seeds where there will be some afternoon shade. For best results, carefully read the instructions on the seed packet. Proper plant spacing is essential. Slugs and snails should be kept away from seedlings. Use netting suspended over seedlings until they are 4 to 5 inches tall if marauding seed and seedling-eating birds are an issue.
Adequate water is a crucial requirement for all sweet pea varieties. If summer rain is insufficient to keep them evenly moist, be sure to water germination-stage seeds, seedlings, and vigorously growing older vines on a regular basis. If the soil is dry when your finger is inserted up to the first joint in the soil bed, water the plants.
Sweet peas are strong feeders, so add plenty of rich compost or well-rotted manure to the soil before planting. At least twice during the growing season, fertilize the soil with a thorough soil drench made up of one tablespoon of liquid kelp and one tablespoon each of fish emulsion. (Every few weeks, sweet peas grown in containers require regular fertilization.)
Aphids can be a problem for sweet peas; spray them off frequently with water. Sticky pheromone traps placed among the vines to attract and capture thrips, an opportune pest, can be used to efficiently control them. Mildew can be avoided with enough airflow and by not watering in the late afternoon and evening ( until the plants succumb to it naturally at the end of their bloom period.)
Almost any vertical support structure will allow all tall vining kinds to naturally grow up it. They will develop into strings, netting, wire, wooden, or pretty much any other sort of trellis. In the soil you can also utilize long branches that were left over after tree pruning. Wrap them in twine or netting so the tendrils can grip because they cannot twine around heavy poles like bamboo. It’s usually advisable to stay away from wire fencing in really hot climates like Texas. Before you sow the seeds or once they are a few inches tall, erect your securely anchored supports.
Between 75 and 85 percent of sweet pea seeds will germinate. There is always a little fraction that goes dormant, giving Mother Nature a refuge in the wild in case of bad weather. Only plant the seeds that have swollen and soak them in tap water for no longer than one night prior to planting in order to leave out the dormant ones. Never soak seeds; rather, nick them to let moisture seep into the seed coat for the highest possible germination rates. To accomplish this, simply cut a small hole with nail clippers in the seed’s outer layer; no chunk needs to be gouged out; this will allow moisture to enter the seed naturally. Although this nicking procedure takes more time, it will ensure excellent germination.
Plant seeds 2 to 3 inches apart and 1 inch deep. Depending on the climate and soil temperature, seeds can fully germinate between 10 to 28 days. Dig down to check if the seeds are still present if your sweet peas do not germinate well. Plant more immediately soon if they have decayed or been eaten since they will quickly catch up. It’s crucial to thin seedlings when they are several inches tall so that they stand about 5- 6 inches apart. This will provide the plants room to develop and flourish. Pinch off the top set of leaves when seedlings have three or four sets to encourage plants to branch out. Avoid significant changes in soil moisture during the active growing season by keeping sweet pea plants evenly moist. Mulching is a wise tactic.
Picking bouquets early and frequently can help you enjoy the longest season of spectacular bloom; the less you pick, the later the plants will go to seed and wither. Harvest flower stems frequently as the lowest blossom on each stalk just starts to open. Although stems may get shorter as the season goes on, the flowers are still large and gorgeous.
Sweet Peas Species
Our common garden sweet pea is the annual species Lathyrus odoratus; you can find them in a variety of colors and growth patterns, including:
tall varieties of vines
Depending on the region and season, these robust vines can grow to be 5 to 10 feet tall and produce numerous flower stems over a six to eight week bloom period. Tall vining plant species come in a variety of floral shapes:
Intense breeding efforts have been made in England to produce tall vining “Spencer” cultivars with bigger, waved and ruffled exquisite flowers. Because English breeders typically have been more focused in petal shape, form, stem length, and color than in perfume or weather tolerance, some Spencers are quite fragrant while others are very faintly so. Nowadays, Spencer kinds can be used to describe the majority of large-petalled, ruffled sweet pea cultivars. We stock the scented Spencer type “Blue Celeste.”
Mammoth and Royals are two American cultivars developed in the middle to end of the 20th century that have good-sized flowers, a light perfume, and are widely available. Since our only area of expertise is scented sweet peas, we do not provide these varieties.
Variety of Containers & Window Boxes
These tiny plants look great in containers and have stems that are 8 to 10 inches in length or have spreading and mounding characteristics. The heirloom varieties “Windowbox Cupid” and “Cupid Color Palette” are available from us.
Short, unable-to-climb Dwarfs
These sweet peas are short and don’t require vertical supports, with some varieties being tendril-less. It’s “Explorer” for us.
Other Species of Sweet Peas:
In the West, the perennial Lathyrus latifolius is frequently observed as a naturalized roadside wildflower. The cultivated form of this perennial, which is far more drought tolerant than annual sweet peas, can be trained to grow into an appealing and dependable permanent hedge plant. Although the flowers are plain, small, and odorless, their shape makes me think of miniature orchids. They come in rose, pure white, and shell pink. We market these colored mixtures as “Garden Orchids.” In zone 4 at Sweet Pea Gardens in Surrey, Maine, where they are quite hardy and over ten years old, Susan Keating has planted perennial sweet peas as a tall blooming screen on the side of her garage. Their flowering stalks also make lovely arrangement flowers.
This diminutive sweet pea, Lathyrus sativus azureus, features 1 inch dazzling azure-blue flowers and tangled grassy leaves. Plants only reach heights of 3 to 4 feet. attractive landscape accents in pots with minimal supports. We offer “Electric Blue” for sale.
Dr. Hammett is attempting to stabilize hybrids between several annual species in order to bring together lovely form and scent with fresh colors and heat tolerance. For home gardeners, the next ten years will bring some interesting new advances, such as real tricolor sweet peas and non-fading orange and apricot colours, all of which have potent fragrances.
Sweet Peas in Containers
Gardeners with patios, decks, or merely tiny gardening spaces can take advantage of the short, mounding kinds of sweet peas, like “Color Palette,” to enjoy their beauty and delicious smell. These small vines, which only reach a height of 8 to 10 inches, have delicately cascading branches and fragrant blossoms. A rose-pink and white bicolor as well as a combination of lavender, pink, dark purple, and mahogany are among the colors. Plant seeds immediately in deep containers with a minimum 8-inch diameter or rectangular window boxes with a minimum 6-inch depth in the very early spring. Always place seeds in planting containers 1 inch deep and 3 inches apart, in uniformly pre-moistened, high-quality, fresh potting soil. Germination takes 10 to 28 days when kept uniformly wet and in full sun.
Make sure to thin seedlings to 4 inches apart after they reach 2 inches in height (so, for example, you would leave 4-5 evenly spaced plants in a 12 inch in diameter container.) Plants can spread out and expand as a result as they get older. It’s crucial to remember to fertilize container sweet peas frequently (every two weeks) and to maintain them well-watered. Defend plants from snails and slug damage. Remove faded blossoms on a regular basis for the longest bloom. Mulch your containers and provide them with afternoon shade during the summer to extend their bloom.