Letchworth campaign group have been out in force to plant more than 150 trees in one morning, with efforts to continue today.
Friends of Norton Common held an its very own 'Arbor Day' on Saturday to mark the town's history, as well as National Tree Planting Day.
Historically, people came out to help plant 100,000 trees in and around the garden city.
However, the break out of the First World War caused the event to decline.
More than 30 joined in to help plant 150 saplings and hedging across the Nature Reserve on Saturday, coinciding with National Tree Planting Day.
The 'Friends' group will continue planting at the next monthly event, which will take place this morning.
A spokesman said: "Special thanks to NHDC Green Team for providing all the saplings/hedging and plant protectors.
"We're planning other tree planting events around North Herts in the new year."
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