Each leaf has 1–3 pairs of oval leaflets and can reach 1–6 cm in length. Native to Italy ans Sicily. 9 Replies 2544 Views February 11, 2008, 20:23 by gobs : Rhubarb leaves Started by martin hall on General Gardening. 1 Replies 1103 Views February 23, 2014, 19:12 by mumofstig : Sweet Pea Started by puravida on General Gardening. Leaf description. Prune the plants back to the ground in late winter or early spring before growth begins. Choose a fertilizer with less nitrogen, since too much causes growth of leaves and stems at the expense of flowers and pea pods. Disease, pests, and problems. In addition, the symptoms of sweet pea poisoning may not show up for several days, making it hard to determine what is making your dog sick unless you actually witnessed your dog eating the plant. Plant them in fertile soil beneath a support, such as a wigwam made of bamboo canes. Alternate compound leaves with winged petioles arising from winged stems. A layer of mulch will help keep the soil evenly moist. Prune to the natural shape of the shrub. It should be borne in mind that sweet peas (and other plants for that matter) just don't need everyday watering on the dull days we've had this year. Prune sweet pea plants with diseased foliage back to the ground in fall. 1 Replies Curbing Sweet Pea Problems. Perennial sweet pea aka Lathyrus latifolius [LAY-thy-russ lat-ee-FOH-lee-us] is a rhizomatous herbaceous perennial. Leaves green. Pea, Pisum sativum, is an annual herbaceous legume in the family Fabaceae grown for its edible seeds and seedpods.The pea plant can be bushy or climbing, with slender stems which attach to a substrate using tendrils. Native geographic location and habitat. Even moisture helps prevent many problems with sweet peas. Known as: Perennial pea; Wild sweet pea; Everlasting pea; The plant is a member of the Fabaceae (fab-AY-see-ee) family and a native of the Mediterranean (northern Africa and southern Europe). Sweet Pea Shrub is not prone to any particular disease problems so it's difficult to say what may have caused the symptoms. Flower description. This summer has unusually been particularly wet and cold and has given the sweet peas a lot of challenges. Sweet pea poisoning symptoms are varied, depending on the type of plant and how much was eaten. Leave healthy plants stand for winter to increase hardiness. Most sweet pea shrubs like myrtle-leaf milkwort and low pinebarren milkwort grow well in U.S. Department of Agriculture hardiness zones 9a to 12b. Pinch out the tips of young sweet pea plants when they reach about 10cm tall, to encourage bushy growth. sweet pea Started by chickpeacurry on General Gardening. I have not had any virus infection for several years now but the most common one that I have come across has been the yellow leaf one. Water in well until they’ve put on good growth. Here are some tips that might help to prevent further sweet pea problems: Water seedlings and young plants regularly until they are fully established. If you plant too late in the season, you may run into this problem. Derrick - I think your sweet peas have been over-watered, this leads to root rot and subsequently yellowing of the leaves. No serious common problems. Excessive nitrogen can also prevent pea plants from flowering. Most sweet peas will grow to about 2m in height. Pea-type flowers in a wide range of colors; fragrant. Discard, don't compost, the leaves and stems of diseased plants to reduce the risk of future disease problems. Pea plants will not flower if the weather is too hot. To determine whether or not it is still alive you can gently scrape one of the branches with your thumbnail to look for green tissue just beneath the bark. You can buy sweet pea plug plants in spring.