In 2017 my wife and I visited the Twin Towers Plaza, the site of 9/11, which was stunningly beautiful for so many reasons. The plaza was planted with Swamp White Oak trees - Quercus bicolor - which I understand are rare in the UK. I brought back half a dozen acorns, three of which germinated, and the plants are now about 2ft tall and doing well. I lovely reminder of quite a day. Also there was the Survivor Tree, a tree found in the rubble of the demolished towers. The remains of the tree were taken away to a nursery and nurtured before being damaged in a storm. It was nurtured again and finally brought back to the plaza where every visit, I'm sure, places a hand on it. It's now looking well. It is a Callery Pair tree. As for planting an acorn for goodness sake, just pop it into a small pot of compost and let it get on with it.
Plant them sideways. Despite having no expert horticultural knowledge, the local squirrels still manage to have plenty of success planting acorns in my garden 😆.
what sort of plane? As London plane is a hybrid and is infertile, so seeds form but don't/can't grow.
all remaining seeds need stratifying (being left outside in the cold in the soil) for them to germinate successfully next year, one per module will work,
bung them in as is and leave them to it, but you may need some rodent protection over winter.
another tip I was taught was chuck the seed in a bucket of water, any infertile, damaged, or partially eaten seeds float and only plant the ones that sink after an hour.
They are dead easy just put them in a pot as already advised , as for squirrels planting them I read somewhere that the nibble out the growing tip to stop them germinating . Also that Jay's plant acorns as they don't do this , I maybe wrong though
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Despite having no expert horticultural knowledge, the local squirrels still manage to have plenty of success planting acorns in my garden 😆.