While thousands of pink tulips carpeted the Cherry Orchard, over 350 Taihaku, or Great White, cherry trees unfurled their blossom.
Alnwick Garden was the only place in the UK to boast such numbers of Taihaku, planted 18 months ago.
The Duchess of Northumberland, trustee of The Alnwick Garden Trust, said: "The Japanese see flowering blossom trees as a rite of spring — it marks the beginning of the harvest.
"As the blossom falls from hundreds of trees, it will leave a carpet of snow-white petals covering the ground like paper confetti.
"Meanwhile by the end of this year we will have planted one million pink tulips to flower simultaneously. It will be an outstanding vision."
Alnwick Garden is run as a charity and generates over £50m for north-east businesses every year, transforming the flagging rural economy of Northumberland.
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