This fantastic hard to find perennial energizes the summer garden with lots of deep rich violet blue trumpet shaped flowers on large clusters arranged alternately around the leaf nodes. A mature clump of Campanula Superba in full bloom will stop traffic in your garden! Campanula Superba grows well in average to moist garden soil and is pest free. The plant becomes a thick clump of deep green foliage with lots of thick flowering stems that are weather resistant and great for cutting. Blooms early summer. Grows 20-24'' tall. Plant 24'' apart in full to partial sun.