I have been growing this Swiss Chard since 2005. This patch came up as ‘volunteers’ at the end of 2015 and established itself last year. Suddenly, it has gone out of the roof. I’ve never seen Swiss Chard this tall. I am getting a tractor man in on Thursday, and so this season, I am going to go for the “GIANT’ plants I have been studying for the past 3 years.
Here is a short video: