a Whopper In Sizefantastic For Exhibitions.amazing value for your money Due To Its Size.harvest August To October.huge Size & Flavour All In One Onion. A Proud Exclusive To Marshalls & A Real Customer Favourite This Onion Is A Real Attention Grabber, Fun To Grow & Fun To Talk About If You Have Ever Been To An Exhibition Before, Then This Show Master Onion Needs Little Introduction To Just How Colossal It Is. To Put It Into Perspective These Onions Can Reach Up To A Whopping 2kg Each!don’t Be Put Off If You Have No Intention Of Exhibiting. The Show Master Is A Great value for your money Addition For The Home Cook. Providing You With A Very Mild, Sweet Flavour To Add To Your Dishes. A Lot Of Our Customers Report Having Mini Competitions Between Friends To See Who Can Harvest The Biggest Onion.pot Up Around Early To Mid-april Into 9cm Pots. We Then Recommend That You Harden Off In A Cold Frame Before Planting Out Early May.