Because it's fall, you may not see a lav orp egg until spring. (shorter days will delay the onset of production.) Mine take 8-9 months for that 1st egg! A friend has an unrelated line of English orps that take only 5.5 - 6.5 months to mature. His birds are smaller and have the very rounded basketball shape. While my orig orps have never gone broody, the ones I got from him have gone broody 2-3xs in their 1st year! So basically the answer to your ? is that it all depends.In your experience, when do lavender orps start laying? Mine is 7 months and hasn’t started laying yet! Her and my welsummer are my free loaders. The welsummer is showing signs so hopefully she will stay laying any day now. But my Orpington has shown no signs!
So what happened when I mixed the two lines.....
JEWEL: a BIG Blue pullet that was difficult to sex early (had larger pink wattles & fast feather growth) She started laying at a record 5 months (it was mid summer) & then went broody at age 6 months!
Pic at 5-6 weeks Her Broody hen pic


I have a Welsummer that hatched March 4 who started laying Aug 16th (so 4.5 months old) and gives 4-5 eggs per week. She's still going strong and now gives about an egg every other day. I'm guessing she's more of a hatchery stock & she's not a cuddler. She wants nothing to do with me unless I have treats. I wanted to have some dark eggs in our basket & for that, she serves her purpose. It's probably part of her personality, but she always insists on only laying in the 4th nest box. It never matters if it's occupied. She always laid her egg on top of broody Jewel. Neither stubborn hen would give up the spot & it wasn't like there was much extra space. So, it's possible that your Wellie is laying somewhere she decided was better than the nest boxes.