The stacking pineapple garden is working out well. I treat many of my Sativa like I do raspberry or maybe even my mints and I will bury the long stem if stretching; I think this helps the sativa honestly but I have not a factual piece of evidence to support it. My Oaxacan reacts positively to stresses. Even extreme ones.
You can see the reddening from temperature effects and also wet feet. I water these really well and keep them moistened as in the tropics it is rainfall that works I think. That is also where I made a mistake in the beginning. Rainfall; has no where near the same influence on the roots of my plants as my choice of sub - irrigation. So I am also changing this going forward.