Sweet peas grow best in healthy soil that keeps moisture but drains easily.
when to plant sweet peas
When between October and April, plant sweet pea seeds. Aim for late October or late November or late February or early March for the best outcomes because midwinter temperatures and light conditions aren’t the optimum. In April or May, sweet peas can also be planted directly into the ground. During a moderate period between March and May, sow your sweet pea seeds and plants.
How late may sweet peas be planted?
Nothing is more pleasant for a gardener than planting sweet pea and other flower seeds in the winter. Getting out my sweet pea seed packets and seeing them germinate and sprout indoors is the most delightful thing to do when there is not much happening in the garden itself and I have been spending days indoors due to the cold, wet weather!
Therefore, if you’ve been considering that the only thing you can do for your garden is sit and observe it from the window, reconsider your position.
Early planting of sweet peas will repay you with delightfully scented and eye-catching blossoms. Sweet pea seeds must be started in late winter or early spring if you plant in a zone 7 or colder climate. Don’t hold off till the last frost! Generally speaking, you should start your seedlings inside 6 to 8 weeks before the final anticipated frost.
It might be too late to grow sweet peas and get decent results if you wait until after your final frost. In other regions of the nation, spring lasts only a few weeks before temperatures suddenly rise. Sweet peas require lower temperatures to grow well.
Sweet peas can be planted in the late summer.
Sweet peas (Lathyrus odoratus cvs.) rank among the most beautiful annual flowers in my opinion. During the spring, these lovely vintage vines blossom for almost a month. The long-stemmed sprays of fluted and ruffled flowers emit an alluring medley of scents that make me think of orange and jasmine blossoms. A room literally smells like a sweet pea bouquet.
Even though cultivating and enjoying sweet peas as cut flowers is a tradition in gardening, these gorgeous blooms are frequently referred to as being “difficult to grow.” However, I’ve discovered that sweet peas are comparatively carefree and enjoyable to cultivate if planted at the appropriate time and given the right conditions. They are deserving of every gardener’s attention thanks to their huge variety of entrancing colors and eerie scent.
Sweet peas
Origins: This aromatic annual vine offers a wide range of varieties. Around 1699, a monk in Italy found the species.
Sweet peas need rich, well-drained soil and can grow in full sun to light shade.
Pests and ailments: Plants require space to encourage air circulation, which will prevent mildew issues. Birds, slugs, snails, aphids, and thrips can occasionally be a problem with sweet peas.
Propagation: Seeds should be used to start new plants. In locations with moderate winters, plant seeds in the fall or early spring. Start seeds indoors in the late winter in regions with harsh winters, and transplant in the spring.
Sweet peas require a lot of food, so fertilize them often throughout the growing season. Deadheading promotes a longer blooming season.
Sow seed in cool weather
For sweet peas to be grown successfully, there are some rules to go by. Plants require full sun to partial shade, well-draining soil, and good drainage. Sweet peas are prone to mildew, thus adequate plant spacing is necessary for proper air circulation. Until they are 4 to 5 inches tall, young seedlings must also be shielded from slugs, snails, and roving birds. Most importantly, seeds need to be planted and raised in cool climates.
Sweet peas are best planted in the fall, right after Labor Day, in regions with warm winters and hot summers. As a result, the seeds have more time to germinate and form strong root systems, which aid in the seedlings’ ability to survive the winter and grow quickly once springtime and longer days arrive. If you neglect to plant in the fall, start the spring seedlings as soon as you can in a spot that gets some afternoon shade. Sweet peas can be planted later in the spring for a late-summer bloom in areas like the Pacific Northwest that see mild winters and moderately chilly summers.
Sweet peas should be sown indoors in regions with chilly winters, then moved outdoors once the conditions are right. To prevent the roots from being disturbed during transplantation, sow the seeds in separate containers with a diameter of 3 to 4 inches. It’s crucial to avoid burying seedlings in the ground any deeper than in containers. Direct-sow seeds in a location that receives some afternoon shade as soon as the ground can be worked in the spring if summer heat or humidity develops quickly in your area. Unlike many other annual seedlings, sweet-pea seedlings are reasonably resilient and can withstand a mild frost.
Prep seeds and beds first
When you know when to plant your seed, you are prepared to move forward. A healthy sweet pea plant will have a germination rate of 78 to 90%. I’ve discovered that nicking the seeds is the greatest approach to improve germination after several years of testing. Create a small nick or cut in the seed’s outer layer using nail clippers. No piece needs to be gouged out; just make a hole for moisture to enter.
Choose a location with well-drained soil for straight sowing the seed. Before planting, add aged manure or compost to the soil and create a sturdy support structure. Up strings, wire netting, fencing, trellises, and tuteurs, I’ve grown sweet-pea vines. I wrap twine or netting over thicker poles so that the vines can grasp because their tendrils can’t climb on anything larger than 14 inches in diameter.
Plant the seeds 2 to 3 inches apart and 1 inch deep when sowing them in the garden. Dig down to check if they are still present if none of them germinate within two to four weeks, depending on the cultivar. Plant more immediately if any have decayed or been consumed because newly sowed seeds can catch up to those that have already sprouted quickly. It’s crucial to thin seedlings when they are several inches tall so that they are spaced 6 to 8 inches apart. This spacing encourages proper airflow, which reduces mildew issues and gives the vines ample room to develop.
Simply orient your sweet peas in the appropriate direction when they are 4 to 5 inches long to teach them to grow on a support. They will effortlessly climb up on their own once they have reached the base of their vertical support.
Use a balanced fertilizer to routinely feed these robust vines throughout their growing and blooming season. Keep the soil in your garden evenly moist but not soggy since sweet peas don’t tolerate big changes in soil moisture. Deadhead flowers to prolong blooming and stop plants from setting seed.
In addition to mildew, while sweet peas are in blossom they are vulnerable to aphids and thrips. Insecticidal soaps do not work effectively on these delicate blossoms. I’ve discovered that an intense water spray usually gets rid of the aphids. When blue sticky traps are strung among the plants, they are quite effective at luring thrips.
The story behind sweet peas
Father Cupani, a botanizing monk, originally found sweet peas in 1699 on an island off the coast of Sicily. Eckford, an Englishman, started hybridizing and selecting sweet peas in the 19th century, resulting in the introduction of grandifloras, which are cultivars that are larger, more exquisitely shaped, and multicolored.
In the English gardens of the Earl of Spencer, a naturally mutated sweet pea with even bigger and more impressive ruffled flowers was found in 1901. The gardening community appreciated these late-blooming, cool-climate Spencer sweet peas, and amateur sweet-pea breeding resulted in the development of plants with a variety of colors and little emphasis on smell.
Since then, American producers have created varieties that are more adapted to our hot, muggy summers. Many of the fragrant, smaller-flowered cultivars from the 19th and early 20th centuries are currently experiencing a rebirth. A lot of new types of sweet peas with exquisite form, color, and potent, robust scent are also being launched thanks to the work of sweet-pea breeders like New Zealander Keith Hammett, American company Bodgers Seeds, and English company Unwins.
A sampling of sweet peas
Garden sweet peas have beautiful, elegant blossoms that range in color from the most delicate pastels to rich, opulent colours. The majority of options are tall vines that can grow up to 8 feet tall in a single season. A few small, non-climbing border-type plants are also present; they only reach heights of 2 to 3 feet. Consider using the small, 8–10 inch long dwarf window-box sweet peas for containers. Here is a list of some suitable cultivars for gardens, along with details on their size and blossom color.
Can sweet peas be grown in the fall?
In most temperate locations of the world, such as USDA zones eight and above, sweet peas can be planted in the fall. Consider delaying planting in colder areas until the second half of winter, when germination can be encouraged with a little extra warmth and spring is just around the corner.
Can I plant peas now, in May?
Nothing compares to the delightful flavor of peas straight from the garden in terms of sweetness. They are fresh candies from nature! One of the earliest crops of the year, peas are planted as soon as the land can be worked, even if snow follows. See our growing advice for peas, from planting to harvesting!
About Peas
Peas are incredibly simple to raise, however they only have a very short growing season. It’s crucial to plant them in the springtime early enough for them to mature while the temperature is still cool. (This refers to planting in most of the United States and Canada in February, March, or April.) In warmer areas, they can also be cultivated as an autumn or winter crop.
Enjoy the flavor of peas as soon as you can because they don’t keep fresh for very long after harvest. The taste of the peas you get in grocery shops, which are frequently starchy, is incomparable to garden-fresh peas.
Most garden and culinary requirements can be met by three types of peas:
- The seeds (peas) of sweet peas, also known as garden peas or English peas (Pisum sativum ssp. sativum), are extracted from inedible pods.
Sweet peas: Can I plant them in December?
In order to minimize root disturbance, sweet peas should ideally be sown indoors in containers that may be buried in the ground, like cardboard tubes.
Sweet peas can I grow in the winter?
You can plant sweet peas as long as your winter days are typically below 23°C. Your climate will, however, have an impact on when you should plant. Early April is the ideal time to plant seeds for summer flowers in chilly places. The customary date for planting sweet peas elsewhere is St. Patrick’s Day on March 17. The blooms will, however, only bloom in the late winter and early spring, so any time between early March and late May is acceptable. Choose between seeds and seedlings. Although seedlings are the simpler alternative, seeds are easier to sow, provide more possibilities, and are also less expensive. At this time of year, your neighborhood garden center ought to have a nice assortment of both seeds and seedlings.
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!)