greenhouse temps

ok so i got my greenhouse up and running and i am pretty pleased with it all , but my main problem is temprature , when i check it on a morning at 7 the temp as droppe to like 50 degrees fahernheit i was hoping it would stay around 60 over night ,

is this normal in all greenhouse growing my house is only a 6x4 and i have read posts about it being easier to regulate heat better in bigger houses but to be frank i dont need a bigger 1 , is there any other way of makiing a higher temp through the night or is there any need for that matter ,i have seen the little heaters but then that would mean i would have to get someone to take it out through the day ...wouldnt it?

 

I turned off the heater in my greenhouse a couple of weeks ago.
Night temperatures are not so important now the days are so long.

Things cool down but heat up very quickly this time of the year.

Unless you use the greenhouse for overwintering plants, the most crucial times for night temperature is in spring when you have small seedlings coming along.

 

i was growing some seeds which have now matured and also some tomatoes , but i have just put some lupin seeds in , and would continue to plant as i may try growing some perrenials for my borders next year , other then that nothing else to be honest

 

Unless you are growing "stove" tropical plants then 10C / 50F minimum night temperature will be fine.

having said that ... we have had several nights here were outside temperatures were falling to 4C, which is pretty much unheard of for June, so still "chilly" in the greenhouse.

 

Ok now to my next question lol . When I start growing from seeds I would like to try and do it in the greenhouse now would one of the little parafin heaters be ok in the greenhouse?

 

For earlier in the Spring you would need to supplement the heat. I doubt you would ened anything now.

Some seeds will germinate better (either more quickly, more evenly, or with higher percentage germination) with some bottom heat. Typically an electric propagator is used for that, or a "heat mat" under the seed trays/containers. But you could just put them in your airing cupboard (inside a clear plastic bag, to stop them drying out, is best) until they germinate (but check them morning and evening and as soon as you see signs of germination get them into the light otherwise they will grow tall & weak (so called "leggy")

 

could i start seeds at any time of the year? not that i am going to just a question ,

 

You can start seeds at any time (well, if the greenhouse is very hot that might suppress germination, but you could germinate them somewhere cooler if that was the case).

The real issue is whether they will put on enough growth before the winter arrives. For Annuals they will die in the Winter, so not worth sowing late if they won't even flower and for perennials they need to grow enough to survive the winter - that can, to some extent, be mitigated by leaving them in the greenhouse so they don't have to fight off the harshest winter weather, and they can be kept drier. But there is much reduced light, and also because it is cooler, which means they won't grow much / at all.

 

That is well explained and just the answer I was looking for. Thanks a lot

 

As you have a greenhouse without any means of ventilation other than by leaving the door open - as it has no windows http://gardenerscorner.co.uk/forum/threads/greenhouse-purchase.51666/#post-688071 I would be extremely concerned about the moisture given off from burning paraffin, lack of airflow, and possibly the effect of fumes on plants in a small 6 x 4 foot greenhouse, plus (without autovents) there's the possibility of the sun coming up early in the morning and combining with the heater still on full to cook the contents of your greenhouse before you get up to turn it off.

 

the sun doesnt effect my grrenhouse untill at least 12.30 in summer but in winter maybe 9 , but had be up then anyway