[JayG]

Jay, I think the sandy soil which we both have, may be the reason for only one cob per plant.

Fraid not MoS - I grew some ( 16 in a 4x4 square) in 2009 and had 2 cobs per plant even in my sand pit.  Not had the room to grow any since though.

Sandy soil certainly doesn't help, nor do the ropey summers lately, but I still get the impression they (Swift) want to produce more than one cob.

Can't do more than I already do do for the soil, and can't do anything at all about the weather, so I've not got much choice but to pin my hopes on trying to improve the pollination aspect of it. 

[mumofstig]

oh well..........I thought it was a good excuse 

[Kristen]

My Swift produce only one cob in the greenhouse (and same outside).  They get plenty of warmth there! and a rich soil. I think the plants are physically too short to support a second cob.

[JayG]

My Swift produce only one cob in the greenhouse (and same outside).  They get plenty of warmth there! and a rich soil. I think the plants are physically too short to support a second cob.

In that case (not for the first time in my life!) I'm sure I'm not alone in hoping for a sure-fire recommendation for a reliable big-un!   

[bigben]

Jay - if it is any consolation I am just down the road from you and while I have managed a second cob on some of my sweetcorn, very few of the second cobs are any good. My soil is not sandy but I must admit to perhaps needing to water and feed them more. Last two years I have just about left them to themselves. Last year was hopeless. I put them out too early and they all died so I then had to sow two half packets of leftovers. They were different types and the corn I got was not very sweet and rather boring. I am hopeing for better things this year. My supa sweet are just popping thru on my windowsill, I will give them a week or so in the greenhouse and perhaps pot them onto something bigger.