The weeping pea tree (Caragana arborescens), also called the Siberian pea shrub or weeping pea shrub, is a deciduous shrub-like tree that has a fern-like, weeping form. This unique tree grows up to 8 feet tall and 6 feet wide, blooming with pea-shaped yellow flowers in late May. The weeping pea tree has satiny bark and delicate green leaves. Weeping pea trees are extremely hardy, tolerating winter temperatures down to -45 degrees Fahrenheit. The weeping pea tree can grow naturally into a full, wide shrub or be pruned into a small tree form.
Select a planting location for your weeping pea tree that’s in full sunlight and has well-draining, lightweight soil. If you have heavier soil, mix into the soil some coarse sand.
Dig a planting hole for your weeping pea tree that’s the same depth as the height of the root ball and twice the width. Mix into the displaced soil some organic compost or peat moss if your soil is nutrient-poor, so that you have no more than one part compost or peat to three parts native soil.
Remove the weeping pea tree’s root ball carefully from the burlap sack or nursery container. Set the root ball into the planting hole with the weeping pea tree standing straight up.
Backfill the planting hole about halfway with the displaced soil, and then water the planting hole generously to help the soil to settle around the roots. Backfill the planting hole the rest of the way with the soil and water again deeply to soak the soil around the roots.
Press down the soil around the weeping pea tree’s roots in the planting hole using your hands or feet. Spread a 2-inch-thick layer of bark mulch on the ground over the tree’s root area, keeping the mulch about 1 inch away from the trunk.
Things You Will Need
- Weeping pea tree
- Coarse sand (optional)
- Organic compost or peat moss (optional)
- Garden hose
- Bark mulch
- If you have poorly-draining heavy clay soil, plant your weeping pea tree so that the top of the root ball is 1 or 2 inches above the ground level. Mound up topsoil over the top of the root ball to assist with drainage and prevent the tree's roots from sitting in pooled water.
- Don't allow your weeping pea tree's roots to dry out, especially during the first three weeks after planting it. Water your weeping pea tree once each week, or twice each week in the absence of rainfall, for the first three weeks. Water the soil around the root ball deeply to soak the ground to the depth of the bottom roots.
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