You can grow lemons in volcanic soil; but you have to add phosphorus. Volcanic soils are usually adequate or even abundant in phosphorus; but it is not available to the plant. I grow lemons in Guatemala, where we have an abundance of volcanic soils (we have 18 active volcanos); many "experts" have advised me that you can't grow citrus in volcanic soils; you can; you only have to add phosphorus. For us it is easy, as we put phosphoric acid in our drip irrigation; it cleans the system, adds phosphorus to the soil; and it kills the rats that chew on the tubes.

BTW my container citrus (gift trees for friends and clients) are grown in decomposed volcanic soil with a little vermiculite added.