My impression too! My thoughts on why unshaded glass is often too arid for arid climate plants unless it is damped down, (sprayed with water), fit with this idea..... Peter (UK) On 21 August 2016 at 23:46, Tim Eck <teck11@embarqmail.com> wrote: > > > We imagine deserts always have low humidity, but is that wrong? > > > > Jane McGary > > > My understanding is that many desert plants get the majority of their > moisture from dew, so deserts aren't necessarily dry at night. > Tim > >