[Munchkin]

I'm growing carrots on my balcony which is one storey up from the ground. Do carrot flys fly up stairs? I had protected them with fleece for a while but the wind is a pain and it keeps collapsing so I took it off today. The carrots are in trugs. Should I keep the cover on?

[DD.]

Wouldn't bother.

They can barely reach 2', I think you're well out of harms way.

[Aunt Sally]

What do you mean by :

"The carrots are in trugs"

A trug is very shallow - not enough depth for carrot roots !

[Aunt Sally]

Or do you mean the floppy plastic bucket things ?

[Munchkin]

Or do you mean the floppy plastic bucket things ?

Yeah the floppy plastic bucket things. I'll leave the cover off and it'll be  an experiment.

[Ian_A]

Like later generation daleks, they can fly up stairs

[JayG]

Carrot flies fly neither very high nor very far (not because they are scared of heights or agoraphobic but because they just happen to be not very good at flying!) 

(That does mean they can potentially get blown to places they can't get to under their own steam (as it were!), but I think you would be very unlucky to finish up with any on a first floor balcony.)

[DD.]

Totally agree, can't imagine a safer place actually.