Depending on where you live and how hot your summers get will determine when the sweet pea (Lathyrus odoratus) flowers. With their fragrant pea-like flowers blossoming in a variety of colors, these annual climbers are eye-catching additions to containers or outdoor spaces. Success is ensured by planting at the appropriate time of year for your locality.
Tip
Depending on where you live, the sweet pea flowering season happens during several seasons. Flowers will bloom in the late spring and into the fall in regions with cooler summer temperatures. Those who reside in warmer climates can look forward to flowers in the winter and spring.
Do sweet peas have a seasonal bloom?
Long-day sweet peas, as their name suggests, begin to produce flower buds when the days are longer than the nights. Because of this, they bloom between spring and summer and are frequently referred to as spring- or summer-flowering sweet peas.
Sweet pea blooms bloom for how long?
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 much more drought tolerant than annual sweet peas, can be trained to grow into an attractive and dependable perennial 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.
How much time do peas need to flower?
- Frost damages pea blooms and prevents the development of pods. Check the optimal sowing period for your region’s climate.
- For the greatest results, I sow during the first moon quarter of the month to take advantage of the soil’s wetness and an active development period for peas and other above-ground plants.
- I personally wait to plant seedlings and instead sow seeds if the humidity is higher than 70% and the temperature is still high. I’m hoping the weather will be better when they are prepared.
- Peas take between 10 and 14 weeks to mature, blossom, and produce fruit, depending on the type. Peas can mature from bloom to pod in up to 3 weeks.
A younger climbing type of sugar snap pea bears blooms. Peas require a trellis or staking as they grow to provide support.
When requesting “quick food”:
- You don’t have to wait for the pods to fill when you choose snow peas. Excellent option for young people and impatient gardeners!
when are sweet peas in season?
Although June and July are the primary flowering months for sweet peas, depending on when you planted and sowed them, they may begin to bloom earlier or later. To extend their growing season, keep watering, feeding, and deadheading.
how to germinate sweet pea seeds?
However, I have observed that sweet pea seeds germinate within 2 weeks with or without soaking. Some people advise soaking sweet pea seeds to assist them germinate; you may find it beneficial to leave them on some damp kitchen paper for 24 hours before sowing.
can sweet peas grow in shade?
Because they are sun-loving plants, sweet peas do best in locations with lots of sunlight. They will not flower as frequently even if they can grow in sunny or dappled shade.
Sweet peas all summer
I frequently entirely forget to sow sweet peas or wait until it’s almost too late, but last winter I recalled. I came upon a haphazard assortment of sweet pea seeds while trying to purge my seedbox of stale seeds. Some of the seeds in the packet were strange seeds, while others were approaching or had beyond their best before date (not that that seems to matter much). With all these leftovers, I reasoned that I had nothing to lose by seeding in December; after all, there would be time in the spring to sow again with new seed, so it wouldn’t matter if they didn’t germinate or grow.
Contrary to what I had anticipated, they did grow, and on June 5th, I chose my first bunch for an Instagram shot. I relished the intoxicating evening aroma of the garden’s profusion of sweet peas throughout the months of June, July, and August. I grew adamant that they would still be in bloom at the end of August since I couldn’t believe they would flower for three months after just one sowing. Let me tell you, there was a lot of deadheading involved there!
I stopped deadheading by the first week of September because I was ready to let them complete their botanical development and form seedpods. By the middle of September, I discovered a dried seed pod among the stems that were still in bloom. Today, on the final day of September, I collected the last small group of blooms. Flowers for four months! Incredible. (Or, at least, that is how it appears to me. Is this prolonged flowering typical? I’d want to say that this was accomplished by my skill as a gardener, but in all honesty, I like to believe that anyone could accomplish the same thing. However, there are a few crucial aspects, so here’s what I did:
1. Get a jump on your seedlings. Sweet pea seeds for the following season can be planted at any time and left in a protected area, such as a cold frame, greenhouse, or cloche. They may require additional protection based on your location and the weather, particularly if you’re growing north of Milton Keynes where the winters are harsh. (Mine endured the rather mild winter on my balcony last year without any additional protection. I believe I’ll plant them in my friend’s greenhouse this year.)
2. Sow seeds in large pots. I placed three or four seeds in each deep pot with a 10 cm diameter (deep root trainers are also great) and set the pots on a shelf on my little, protected balcony. Surprisingly, I achieved 80 to 100% germination in each container and, other from a very small quantity of watering, basically let the seedlings take care of themselves.
3. Pay attention to the flora. By February, I had to trim the tops to keep them from growing too long. The plants on my balcony tended to grow toward the light because it is somewhat shaded on three sides. The plants can bush out by pruning the tops above the first four sets of genuine leaves.
4. Begin planting in mid-April (if possible). My went outside in early May because I had other things to keep me busy. To minimize root disturbance, I didn’t separate the seedlings before planting. Although four seedlings to a pot is not ideal, once planted, they had plenty of room to grow since each cluster of seedlings was separated from its neighbor by roughly 40 cm. I prepared the planting holes by adding a small bit of blood, fish, and bone, mixing it with the earth, and then dumping the entire pot of seedlings into the hole. The prefabricated trellis was attached to each plant, and the row was well watered.
5. Drink plenty of water. I made sure to water the sweet peas first to keep the soil moist. Additionally, I occasionally gave them a boost by feeding them some diluted homemade comfrey. I also made an effort to hit the roots in order to dry the leaves. (I’m sure the rainy spring and summer also contributed.)
6. Encourage and support. Actually, it was my neighbor who helps out who tied them in as they grew, and we both made sure to water and deadhead the flowers on a regular basis. To encourage new blossoms, each bloom was trimmed down to the stem’s base as soon as it began to fade.
7. Mark and store. I’m eager to store the seed for the following year because these plants did so nicely. As they grew up the trellis, the plants had a tendency to entwine themselves with one another. I made the mistake of not labeling the stems, so now that I’m storing the seed pods, I’m unsure of which sweet pea I’ll get when I plant those seeds. It will be a great surprise!
As the summer progressed, I saw some lovely variances in the flowers, and I assume that cross-pollination may be to blame. Anyone else who has found this? I was growing my favorite varieties of Chiltern Seeds, “Summer Sizzler” and “Flamenco Mix,” which were provided to me by the incredibly lovely Flighty, in a one and a half meter row. These seeds include purple/black, white, lavender, pale pink, as well as colors of vivid pink and purple. The task now is to sow the seeds that I’ve conserved and see if I can produce a repeat performance, so I’m hopeful that those variances will show up in next year’s flowers.
Update: I neglected to mention that all flowers, excluding the extremely dark ones, had absurdly long stalks as well. The longest stem I measured was 16 inches!
How did everyone else fare this year with their sweet peas? Did my plants thrive or was this a widespread pattern? And who has already begun the annuals for the following year? (I’ve got mine to finish this weekend!)