Terpe.. Although I have never been to Mindanao,I joined a Filipino Yahoo group a few years ago to find out more about hydroponics in the country. These guys had a huge huge poly tunnel in Bukidnon and were producing some fantastic looking stuff.. Now here`s the thing..Bukidnon or (Bukid) means mountain or mountainous.. They told me that this elevated height was the main reason they could produce nice looking iceburg lettuce and even strawberries.. I kept some of their photo`s..Here they are.






I asked them about where they purchased hydro nutrients from and they told me all is ordered from Manila.. A lot of knowledge required as these nutrients dont come ready mixed..You buy each mineral by the sack load and mix them yourself..Obviously this mix changes depending on what you grow..
I have recently discovered a technique that an American fella invented .. Absolutely fantastic IMO.. Im gonna build my own version pretty soon.. The system is totally self watering all season.. More time for me to water self with SMB nutrients!
Here`s the videos..

<a href="http://www.youtube.com/watch?v=GRQzhFBCot4">