Daikon Radish

[Misfit]

An old family friend gave me two types of daikon she received from her brother in Japan. No names other than Summer and Winter. Red and black seed respectively.

To make a long story short I lost all of the black seed in the wind except for one. So I've been growing that one radish hoping to save the seed after it bolts.

The thing is huge right now and showing no signs of flowering at close to 5 months old.
Is there anything I can do to hurry this process along?

-Jimmy