On the contrary.. Unless there is a major difference in growing outdoor (Which I wouldn't know because I don't) it will probably almost double in size, maybe not THAT much but still has a lot of growth leftI am not sure why you want to retard its growth, because most plants will grow a few more weeks once flowering has started. So naturally it will not grow in height much more, but you do want its bud growth to take off. Water and mulch the area around your plants with composted manure to add nutrients and retain water. You can foliar feed your plant up to three weeks before harvest.