Hunger Overhaul for 1.6.4 removed the ability to plant Pam's food directly on farmland. That has not been ported yet.

Furthermore, HarvestCraft for 1.7.10 does not drop the seed item when harvesting an immature crop, but rather it drops the product (example: harvesting a 0% growth cucumber crop gives you a full cucumber, not a cucumber seed).

The former is something we should implement, but the latter is likely an unintentional HarvestCraft bug that should be fixed.

So is this a feature to be implemented or a bug to be fixed? I'm confuzzled.

Wait, when you say plant pams food, do you mean the actual blueberry or the seeds?

A bit of both.

The actual blueberry/cucumber/tomato/etc. It's a feature of HarvestCraft that Hunger Overhaul used to disable (thereby forcing you to convert fruits/vegetables to their seed form before planting them), but our 1.7.10 version doesn't do that (yet).

Oh yeah, so you have to plant the seeds as normal.