I have just seen snow in N. Spain, in May, nobody can remember it before, this sodding Volcano may well send the weather crazy for a while. Reading the article below made me think that getting covers over the plants may be the priority for many of us, I doubt Volcanic ash residue adds much to the quality of outdoor weed.
How an Icelandic volcano helped spark the French Revolution
How an Icelandic volcano helped spark the French Revolution
barley crops "became brown and withered … as did the leaves of the oats; the rye had the appearance of being mildewed"