Perennial sweet peas tend to … It is an annual climbing plant, growing to a height of 1–2 metres (3 ft 3 in–6 ft 7 in), where suitable support is available. Consider burning bush (Euonymus alatus) for example—an exotic (or "alien") shrub from Asia. 6 too, and have had both plants you mention in your post, I got rid of the perennial sweet pea - it outgrew its spot (way too small, I was thinking more of the annual sweet pea's size) and was not fragrant. Sweet peas grow as vines or as bushes and prefer cooler climates. While most sweet pea plants are annuals, there are a few perennial types available. everlasting-pea, perennial pea, perennialsweetpea Introduction: Perennial peavine is a widely established European native identified in every state except Florida and North Dakota. A There are two basic types of sweet peas: annual and perennial. Some invasive plants listed are quite attractive. Few shrubs put on a better fall foliage display. Perennial sweet pea (Lathyrus latifolius; Fabaceae) is an herbaceous perennial vine in the pea family that has a long history in horticulture as an ornamental. It is very invasive on road shoulders and seasonally dry meadows. I'm in z. In fact, these plants can improve the quality of poor soil by fixing the nitrogen levels when planted temporarily. The annual ones (Lathyrus odoratus) are the single-season beauties we know and love.In many areas of North America, the perennial sweet pea (L. latifolius) is an invasive problem, clogging open fields and roadsides.It looks pretty until you realize it’s crowding out other plants and acting like a thug. The sweet pea, Lathyrus odoratus, is a flowering plant in the genus Lathyrus in the family Fabaceae (), native to Sicily, southern Italy and the Aegean Islands.. One person's "invasive" is another person's "spreading with no trouble." The perennial sweet pea plant prefers a soil that is normal to moist and can tolerate some sand and clay loam soils. 1 Know What You’re Growing. It has naturalized throughout the United States, in Australia, and beyond its historic native range, across northern Africa and southern Europe. Sweet peas are popular garden plants because of their large, fragrant flowers colored pink, red, blue, purple, orange or white. Synonym(s): perennial pea, everlasting peavine, everlasting pea, perennial peavine, Perennial sweetpea Native Range: Europe ( BAIL ); Selected Images from Invasive.org