let me preface this by saying i dont exactly practice what im about to say as much as i should:
your eating habits should not be a "diet", as much as a consistently adhered to nutrition plan and eating philosophy.............. ..a bodybuilders "diet", whether they are "bulking" or "cutting" should ideally not look all that different..............t he same foods would be eaten, with only the quantity and macro nutrient ratio changing.
also, unless you:
1) just are starting lifting, from scratch or from time off
2) going on your first steroid cycle, or dramatically upping your typical dose and adding new, exotic compounds
3) are some 1/1,000,000 genetic mutant
"growing" into a show is pie-in-the-sky BB culture jargon..........you hear a lot of them talkin about "growing into a show", but its really bullshit
"growing into a show" translates into............."i didnt let myself become a fat, bloated pig in the previous offseason"
you cant grow without a requisite calorie surplus (except for the conditions i mentioned).........
there is an industry legend about levrone actually gaining weight into shows..........but thats because he would "supposedly" go off shit for months at a time after his competitions............ ..so with his genetics, and of course going back on large doses of steroids, its possible................ .but like most legends, its probably highly exaggerated how much weight he gained into the show.............he weight probably didnt skyrocket as much as his body composition changed from fat to muscle.
either way, you dont have levrones genetics im guessing............so i wouldnt count too heavily on growing into your next show