Though there are some perennial varieties of sweetpea, most antiquesweetpeas available online are considered to be annual flowers. Old-fashioned sweetpeas are open-pollinated, which means that they will grow true-to-seed when saved and planted each season. Learn how to growsweetpeas for maximum fragrance and blooms. Discover when to plant, winter sowing tips, and how to care for these classic cottage-garden flowers. Plantingsweetpeas, I harvested these dwarf sweetpea seeds last year, with them being a dwarf variety they grow approx 40cm tall (great for containers). I wet the compost first not to disturb the seeds when they’re all tucked in. Sweetpeas Flowers. PlantingSweetPeas.SweetPea pots. an outdoor garden with various types of plants and flowers in the ground, including trelliss. All you need to know about sowing, planting out and growingsweetpeas, in this practical Grow Guide, from BBC Gardeners' World Magazine. But if you’re growing your autumn-sown sweetpeaplants as ‘hard’ as you should be, then they’ll often naturally produce these side-shoots themselves without any need to nip them out. Planting & Growing:Sow seeds in full sun in cool early spring weather (as early as the ground can be worked). In mild winter climates, where the ground does not freeze, sweetpeas can be planted in the fall. How to growsweetpeaplants. Sweetpeasgrowing in frames.Sweetpeas love a rich, moist soil so dig a couple of buckets of compost into the planting area beforehand to enrich the soil and hold moisture during dry weather. Steps to growSweetPeas IndoorsProvide adequate lighting once sweetpeaplant has sproutedEnsure that the sweetpeaplant has a trellis to properly grow Many people prefer to grow herbs, sunflowers or even their own chilli plant but the scented blooms of the sweetpea still stand out as many gardener's favourite. Complete gardeners gifts; Everything you need to kick start the growing of your glorious sweetpea flower plants. How to growsweetpeas with kids. Sweetpeas can grow up to 8 feet tall and come in all sorts of colours from red, purple, lilac, white, pink and blue. They can be grown in full sun or light shade, and need a moist, fertile soil. Plantsweetpea seeds 1 inch deep and 2 to 3 inches apart. When seedlings are 2 inches tall, thin them 4 to 5 inches apart, to allow plants room to mature. Attributes and Characteristics. Native to southern Italy and Sicily, annual sweetpeagrows well throughout the U.S., provided you pay attention to the appropriate sweetpeaplanting time based on your locale. Sowing Indoors: Sweetpeas seeds can be sown indoors in late autumn to early winter into rootrainers or long thin pots. They can also be sown indoors in spring and planted out in April to May. If you are planting in January to February, your seedlings may need a little gentle heat to germinate.