Pick the flowers regularly, any you do not pick must be deadhead regularly. Sweet pea flowers come in many colors, making them a popular choice for gardens and floral arrangements. The sweet pea is a flowering plant that’s native to parts of the Mediterranean, but people grow it all over the world for the sweet-smelling and beautiful flowers. Sweet pea pods and seeds are not edible, but you can harvest them from the plant to propagate more flowers. Like all sweet peas, it prefers colder climates and will thrive up to USDA Zone 3. Sweet Pea Perennial Vines. Water your Sweet Peas with a regular and good soaking. I have a hard time getting them to actually grown here in Southern Oregon, we have cold winters (below freezing usually not more than 5 or 10 degrees) but very very hot summers with many days usually over 100 and not humid at all. Sweet pea cuttings can be taken from young sweet pea seedlings. Until july of this year I only knew about annual sweet peas even though I had perennial sweet pea in my garden for more than 25 years.I always thought it is self seeding. You will need some young sweet pea seedlings, jar of water, sharp, clean scissors and some rooting hormone. If powdery mildew is mild to moderate, try spraying pea plants with a plant-based horticultural oil such as neem oil. And I tried so many times to get rid of it. It may be difficult to find a more colorful and easy to grow flower than the perennial sweet pea vine (Lathryus latifolius). Never spray when the temperature is above 90 F. (32 C.). I live in Zone 3-4. This encourages new flowers, leaving them on says to the plant ‘the job of producing seed has been done’ and the Sweet Pea shuts down flower production. Sweet Peas will continue to grow and flower at the top. I have found that the invasiveness of things like Sweet pea have to do with where you live, and how much attention they get. Sweet pea seedlings are a favorite snack for birds, slugs, and snails, especially if planted in fall. My Gardenia’s Leaves Are Turning Yellow - Why are the leaves on my gardenia turning yellow? Q. Transplanting Perennial Sweet Peas - How and when can you transplant a perennial sweet pea? Some are green with spots of yellow. Blossoms are white, pink and pale purple, grow on vines and, unlike annual varieties, do not produce fragrance. Protect seedlings from pests with netting, if necessary. It is a rescued… Q. Blackberries Shrivel And Die - After my blackberry bush began to yield fruits, they shriveled and died. You can also spray peas with commercial fungicide at the first sign of the disease. Spread a 2-inch-thick layer of mulch around plants and water them regularly for best flower production. I use Dip n' Grow liquid rooting hormone. Lathyrus latifolius, the perennial sweet pea or everlasting pea, is the most common perennial sweet pea and can be easily found at most garden centers. Q. If you only have a few plants of a variety and want more but have run out of seed, then it is relatively easy to take cuttings and get them to root and grow. Here's how to get rid of slugs in your garden. If weather is conducive to powdery mildew, it helps to spray the leaves even before the disease shows up. But then I recently read there is perennial sweet peas as well. Sweet Pea Reminders.