Plants in the Alpine House or Cold Frame: Using a horticultural tunnel for alpines
Started by: John FRESHWATER
Any advice on growing alpines in 'tunnels' ?Go to latest contribution by Tim Ingram, 05 January 2015, 11:00. Go to bottom of this page.
John - the short answer is that they can be grown well in polythene tunnels. Commercial nurserymen use these regularly. For certain plants - eg: daphnes - the extra warmth and control of moisture levels often results in much better flowering. The longer answer is that using polythene films that enable better transmission of UV light is valuable (Visqueen produce these in the UK) and alpines do individually vary in their tendency to etiolate and grow out of character, even under glass, so a lot depends on what you grow. Aesthetically a glasshouse is more attractive and gives more control over ventilation and temperature extremes (it is easy to remove glass panes and replace with netting, but some polytunnels are made with netting part way up the sides to improve ventilation in summer) - the particular climate, aspect and situation of your own garden will also be a big factor.