Grand List of Simple Questions

[animary]

You can plant any seeds you find; skills come into play once you've harvested, except for farming skill, which factors into q when planting. The farming skill of anyone harvesting doesn't matter.

For grapes just build trellises and right click the grapes on the trellis; you will have to destroy the old vines and "plant" higher q grapes to improve them.

[vatas]

Winemaking is needed to plant grapes (you should get a clear error message if you try to plant them while not having the skill.)

Grinding 'Cured Pipeweed' into Pipestuff is a crafting recipe that (as usual) requires discovery of the raw material and the relevant skill, 'Pipes & Pipeweed'.

'Farming' confusingly can refer to three different things:
1. Basic skill that allows you to plant/harvest most crops (one-time purchase)
2. Attribute that applies the softcap when planting and is relevant to various crafting recipes (colloquially referred to as "skill" - for an example, "raise the farming skill" - leading to confusion with number one)
3. Farmer -credo is sometimes referred to as "farming credo"

[animary]

Odd, I've been able to "plant" grapes on trellises, harvest and eat them. But could not build an extractor, or even use one, til I had winemaking. But that's a relatively inexpensive skill, just have to remember to get it.