General Care

• The Thundercloud plum thrives in full sun in cool climates but may need some shade protection in the hot afternoon sun in the south. Fertilize in early spring with a balanced nitrogen plant food. Place a mulch of compost around its base for year-round water retention. Young trees need weekly watering during spring and summer until their roots take hold in approximately three years. Water it deeply around the trunk and out three feet in diameter until the tree is established. Little pruning is necessary except for early shaping or to deter branches from reaching structures or electrical wires.
  
  

Condition of Leaves

• Leaves should be deep in color and free from excessive blemishes. When the leaves curl or have many dry spots, turn a few over and inspect the back side. Look for signs of insects or their nests. Aphids may be the problem, but there is an array of pests that are attracted to plums, depending on the region. These usually affect the tree only temporarily. Simple measures can be taken. Spray the tree with water using a strong hose nozzle to dislodge many insects and hold the problem at bay for this season. Plant nurseries are the best source for diagnosing plant problems. Cut a small branch section, place it in a plastic bag and take it in for a quick analysis and advice on treating the tree.
  
  

Soil Conditions

• If a young plum tree has been growing well and suddenly seems to be failing, air pockets left during the initial planting may be drying out the roots. Tamp down the surrounding soil after planting to eliminate them, water well, then fill in any depression left at ground level with soil.
  
  Question what has been put into the soil recently. Oil and gasoline spills or fumes from vehicles injure and may kill nearby trees and shrubs. Over-fertilization is another major cause of plant failure as is over- or under-watering. For a newly planted tree, the soil may lack essential nutrients. Take a soil test with a home soil test kit or call the local county extension service to arrange a professional test.
  
  

After Care

• Aphids and other non-boring pests will affect the leaves for that growing season only.
  Once the leaves drop and grow back in spring, the tree will be well and fresh again. Keep a closer watch on its progress to catch problems early. The Thundercloud plum is very hardy and will survive with little care or interference once the source of the problem is eradicated.