Is there any problem carrying a live plant (not cannibas or anything similar) into Barajas in your hand carry from the US?
I'm pretty sure it's technically illegal - though I don't know that for a fact.

No. Seriously, you should google.
http://europa.eu/youreurope/citizens/travel/carry/animal-plant/index_en.htm
I did google Barajas and got nothing about plants. This was provided by another forum and is more specific:
www.spainbuddy.com/list-of-prohibited-plants
Turn out that the problem is solved. They bought seeds.
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