Wall Hanging Type Polytunnel & Greenhouse Thermometer
A wall thermometer is an invaluable tool for the greenhouse or polytunnel. It's very handy to know your temperature for lots of reasons, here’s just a few:
Did you know lettuce wont germinate in temperatures over 25º celius? When lettuce seed gets too hot it will be forced into dormancy meaning the seeds won’t germinate. This is one of the most common reasons for failure of lettuce plants. Keep an eye on your thermometer and if the mercury gets above 25º place your seedling trays in a cool shed for a couple of days until the seeds germinate.
Most greenhouse plants like a temperature of about 28º, anything over 30º can slow down growth cause damage to many plants. When the your greenhouse or polytunnel gets too hot make sure you have adequate ventilation.
When starting vegetable seedlings earlier in the year it is also helpful to know your temperature. Daytime winter temperatures in the tunnel can be significantly warmer than outside but at night there is little difference. Protect young seedling plants from frost with horticultural fleece which will insulate from between 3 and 5 degrees.
Too hot or too cold? How do you know without a good polytunnel or greenhouse thermometer? That is why it is a cheap simple but essential bit of kit that all gardeners big or small should have. Hang it up and there you go. Nothing as simple but giving you vital information day or night 365 days of the year.
A good value simple and easy to read thermometer. Invaluable in the polytunnel or greenhouse.