Cucumber germination?

Hi everyone, just wondering how long it should take for cucumbers to germinate & if they have to be at a specific temperature? I started mine inside about a week and a half ago, I put them in the greenhouse about four days ago as it was very sunny during the day but no sign of germination, I'm growing a slightly unusual round variety called 'crystal apple' any advice welcome.

 

The nights are still very cold. I made a propagator from an old fish tank , a 60 watt heat tube and a stat. Kept it pegged at 20c and cucumbers were up in a week. Theyre still in there ,about 5 inch high.They do need warmth I think.

 

Ideal temperature is about 20 to 25 C. Germination can take a couple of weeks so don't give up yet!

I start mine in a heated propagator at about 22C and they usually pop up in 10 to 14 days.

 

Hi Mine have been in an unheated greenhouse, (under fleece) and they have only just come up....took about 3 weeks
Definately time is affected by temp