Planted blueberries give only 1 berry when harvesting.
Tried planting some blueberry seeds and only got 1 berry each per bush when they were done. So far all other plants/mushrooms has given me 5-6 per box, so I can only assume this is a bug.
If you swap to growing your crops in an Herbarium major of any type, with Charm of Bounty and Oberon's Bounty, you should see more significant harvests on anything it's possible to plant. Creating seed in a realm with a Farm minor card also changes the yield of seeds to 2:6 (plant:seed) and makes it much more profitable to be farming.
This doesn't fix your issue with trying to grow in an Abeyance but it does seem to be intended behavior that using the magick, charm, and card systems makes things work more efficiently.
If you swap to growing your crops in an Herbarium major of any type, with Charm of Bounty and Oberon's Bounty, you should see more significant harvests on anything it's possible to plant. Creating seed in a realm with a Farm minor card also changes the yield of seeds to 2:6 (plant:seed) and makes it much more profitable to be farming.
This doesn't fix your issue with trying to grow in an Abeyance but it does seem to be intended behavior that using the magick, charm, and card systems makes things work more efficiently.