Minimum Growing Space

[Devonian]

I've had a cursory look at the Hydroponics/aquaponics and although yes it has the potential to grow more (in the same space) and more quickly, there are a few issues for me:

1. As Mary say's it is a bit faffy! (Monitoring PH, nitrogen, oxygen etc etc)
2. You need a power source
3. You need to keep changing the media
4. You need to be adding nutrients
5. It is only really suitable 'light' leafy veg like spinach and salads and so you would still need conventional plots as well

So its suitability in a future survival situation where power is likely to be an issue means these systems are likely to be severely restricted - or am I missing something?

Also space is not an issue, its knowing how much space is needed.....

---

Apparently "The Complete Book of Self-Sufficiency" by John Seymour - has the answers to this - thanks TOF