References in periodicals archive ?
Research Ideal for dense shade is the hard fern, or Blechnum spicant.
Roedd y rhedyn ungoes yma (Pteridium aquiliunium; bracken), y farchredynen gyffredin (Dryopteris filix-mas; male fern) a'r wibredynen (Blechnum spicant; hard fern) i gyd yn tyfu yma.
Ideal for dense shade is the hard fern or Blechnum spicant, but this plant, unfortunately, only thrives on acid or lime-free soil - so it's important to do your plant research before you buy to avoid making mistakes.