I was wondering if any of you long-time outdoor growers have had any luck using reflective materials outdoor to increase the light added to your plant.

I'm saying foil and the like positioned around plants. The reason I'm asking this is I have an outdoor grow with around 5 week old plants situated in different areas. One is by itself and generally gets constant direct sunlight and is maybe 7-9'' and others (which I have now realized aren't in the best spots ever) are maybe 4-6" with a good amount of stretching. I just started using some organic nutes last week and they seem to be helping. I just wanted to know if adding anything would help increase the sunlight and thus increase their growth.

They are all bagseed however, so my genetics are probably not that great.

Thanks!