They require stratification first and this can be reproduced artificially by putting them in the fridge for a couple of months before planting them in the spring. Alternatively you can just plant them in the autumn and let nature do it.
plum-pit-seed-germinate
They require stratification first and this can be reproduced artificially by putting them in the fridge for a couple of months before planting them in the spring. Alternatively you can just plant them in the autumn and let nature do it.
1–2 minutes
Ground to Ground 
Write some words and spread joy