Water the eucalyptus silver dollar plant weekly. Use a drip ring to supply the silver dollar with 5 to 20 gallons of water per week for the first two years. The plant will need 15 to 20 gallons of water twice a month during year three and as needed thereafter.
Prune the eucalyptus silver dollar in the early spring. Use a pruning tool to remove dead, damaged and inward growing branches. If you prefer the shrubby look, only minor pruning is necessary. But for a tidy, tree-like appearance, all suckers (secondary branches) must be removed that do not extend directly from the center trunk. This tidying up should be done yearly.
Feed the silver dollar plant a slow-release fertilizer. Follow the packaging instructions for allocation amounts and application recommendations. Eucalyptus silver dollars appreciate a dose of fertilizer in the early spring before new growth begins.
Mulch around the eucalyptus silver dollar with a 3- to 4-inch layer of bark chips. Mulching improves drainage and reduces weed growth under the canopy of the tree. Leave a 6-inch distance between the wood of the silver dollar and the mulch to prevent pest infestations.
Contact a professional arborist if pests infest the eucalyptus silver dollar plant. The silver dollar is susceptible to infestations by the eucalyptus beetle. A professional arborist can diagnose the infestation and draw up a remediation plan.