I am wanting to purchase a heater for my greenhouse 6' x 4' its aluminium and polycarbonate. I'm not really keen on the paraffin heaters as I have a 3 year old son. I have seen online the tubular heaters but are they any good? If so what size would be best?
I'm wanting my grape vine to finally produce grapes this year and just can never get it warm enough thanks to our great British weather!