What happens when you die Grandpa?

Every year on Grandpa's birthday, the cherry tree is covered in blossom. But this year there is nothing left but a stump.

'The tree was very, very old,' said Grandpa. 'It was time for it to die.'
'You're very, very old,' Harriet said anxiously. 'Are you going to die?'
In this moving story about cherry stones and poppy seeds, caterpillars and baby chicks, Harriet learns about death and new life.