Posted: 02/03/2012 at 16:22
Hi meema, if you're growing things that need to be started off before it warms up outside, or plants that need it to be good and warm throughout their growing season, you could invest in a heater of some kind. I have a paraffin heater but there's lots of ways you can do it, from individual heated propagators, fan heaters, heating mats etc. It depends how much and what you're growing, and what you can afford. I tend to keep the stuff I'm growing now on windowsills in the house (as it's already heated) but I'll probably move them out to the greenhouse when they're ready to pot on and then I'll use the paraffin heater and fleece (on especially cold nights) as I don't have a power supply, and frankly can't afford the cost.
I use gravel trays under all my pots and seed trays as it's much easier to water from beneath, so it might be worth you investing in some of those.....a fine rose for your watering can otherwise.
If you're likely to be going away on holiday and can't get anybody on watering duty, then a drip system might save you a lot of heartache.
Really though, it's worth you buying the bare minimum and then deciding what you need as you go along. After a couple of years you'll probably know how you prefer to do things and what works in your particular situation and location.
Good luck! I remember how excited I was about my new greenhouse