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.
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.
Do pea plants need to be supported?
Bush peas and climbing peas are the two different heights of peas. Everybody gains from some sort of assistance. Even though bush peas are just 2 to 3 feet tall, if you don’t give them anything to climb on, they will flop to the ground. Climbing peas require a strong trellis because they can grow to be 6 to 8 feet tall. Peas progress with 1 “tendrils that they use to encircle objects smaller than a quarter inch. trellis netting, twine, string, or wire mesh with a grid size of at least one “square, everything works. Plant peas on both sides of the trellis for the best harvest.
How may sweet peas be supported in a wigwam?
- your selection of seedlings for sweet peas
- high-quality compost with multiple uses
- fluid fertilizer
- labels on plants
- a hand shovel
- drinking cup
- wigwams made of willow, bamboo, or metal, or an obelisk.
Step By Step Guide
- First, fill a sizable patio pot with high-quality compost for multiple uses. Or, for an additional boost, fork in garden compost and a sprinkle of basic fertilizer to grow your sweet peas in a flower border.
- Place five or more 6ft/180cm bamboo canes into a circle and join the tops with garden twine to form a ring. Alternately, if you’d rather, pick out a pre-made metal or willow obelisk.
- Plant three sweet pea seedlings with a hand trowel at the base of each support. Add a bit more compost and gently press down on top before giving it some water to settle.
- To encourage your sweet peas to start climbing the supports on their own as they mature, tie-in fresh shoots using garden twine.
- Keep plants well-watered, and feed them once a week with liquid fertilizer to promote robust, healthy growth and an abundance of fragrant blossoms starting in the early summer.
- Sweet peas create excellent cut flowers and continue to bloom as long as you select them. Regularly remove dying blossoms to lengthen the blossoming season.
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.
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 are sweet peas raised for a fence?
It’s time to try growing sweet peas again if you’ve already tried (and failed). Few things compare to the joy of stepping outside to gather a vase full of flowers for the home; their wonderful perfume is the essence of summer. You can make spring sowings, but getting a head start on them by starting them now or in November can help.
Choose the location where you will raise them first. You’ll need room for either some pea sticks or a wigwam built of six or seven bamboo canes. Put up some pea netting, which you can purchase in rolls at garden centers, or place bamboo canes against the fence at 30 cm intervals if you wish to plant them next to a fence.
After choosing your location, dig a trench that is around 30 cm broad, fill it with well-rotted manure, and then cover it. The manure will nourish the sweet peas because they need food in order to produce blossoms, and it will also help them retain moisture in the heat.
If you want to succeed with certainty, it is worthwhile to invest in certain equipment. To sieve your compost, you will need a small sieve or potting riddle and several substantial root trainers, known as Sherwoods (these can be snapped open, which helps to minimise root disturbance). It is crucial to have a plastic greenhouse or cold frame. Also helpful is a slug deterrent.
If you’re on a tight budget, consider making your own cold frame out of old window frames, using toilet paper rolls as pots for longer root runs, and rubbing the compost between gloves to make it finer. Beer on a saucer can be used to make slug traps.
The enjoyable part will now come: selecting your seed. There are dozens of additional options available, but a normal packet of “Spencer Mixed” will give you a completely respectful performance. Although the flowers are smaller, older cultivars (sometimes referred to as grandifloras) typically have the richest fragrance.
Roger Parsons, who owns the nation’s collection of sweet peas (Lathyrus odoratus) at his nursery in Sussex, is adamant that this is not necessary if the seed is fresh and may even be harmful to germination. You will frequently read that seed should be soaked for a few hours or the skin scratched with a file. (I’ve tried both methods and had success.)
I advise using John Innes Seed Compost for germination if you have previously experienced issues with rotting seeds. It has a light, sand-like texture and is freely draining. It dries up quite rapidly but rehydrates quickly when watered. After adding compost to the root trainers, moisten them.
The seed should be sown about half an inch deep. Put two seeds in each one-litre plastic pot so you can later plant the entire thing between canes and tie one to each cane.
Use a decent general purpose compost instead, but sieve it beforehand to get rid of lumps if you’ve had some success with seedlings. J Arthur Bowers General Purpose Compost is a favorite of Parsons’s (although, he admits, it contains moss peat). I also think Levington is of high caliber.
To speed up the process and reduce the chance of decaying seed, it is a good idea to germinate seed inside on a windowsill or in a conservatory. Move the pots into a cooler space, such as a greenhouse or cold frame, as soon as the seed has germinated and broken through the soil.
Most people make a mistake here because if the temperature is kept too warm, the plant puts on a lot of top growth and grows thin and lanky. Instead, over the winter, the plant should establish a strong root system so that when the warmer weather arrives, it will be prepared to grow.
After the first two sets of leaves have formed, pinching the tips of plants is meant to make them bushier, but Parsons claims that this is not necessary for a strong plant (again, I’ve had good success with both ways).
Plants may need to be protected from slugs and from birds in gardens with netting. Plant in the ground you prepared in the fall at the end of March, after acclimating a bit, and water well during dry spells.
From July, feed once per week with tomorite or other high-potash feed. Once the flowers have opened, be sure to pluck them or deadhead them because the sweet pea’s flowering time will be shortened if it develops seeds instead of additional blossoms.