A daisy again!!!!!!

Several weeks ago I blipped a daisy that I had 'played' with in Photoshop. I liked it, so did some others. I have blipped before about my renovations, and have nearly finished my kitchen. I have had a canvas made of said daisy- an A2 size,I am delighted with it. This is it on kitchen wall. I am a bit sentimental- (must be my age) as this daisy plant was given to me by my mother about 40 years ago. Each time I have shifted a little chunk comes too. Yes I know, I am soft!!!! Enjoy it, I intend too. Any ideas out there in blipland, will I need to seal it? And what with? It is a photo on canvas.