I agree Shane......excellent advice.
I'm always faintly amused when I see people trying to grow trees and similar large plants in media grow beds when they can actually be grown much more cost-effectively by other means.
Microponics (integrated backyard food production) advocates the use of several (hydroponic and soil-based) growing systems.....for the very reason that you've discovered......that non every plant will grow well in the same system.
Gary
"All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Arthur Schopenhauer
www.microponics.net.au - for candid dialogue on integrated backyard food production.
www.urbanaquaponics.com.au - the home of the Online Urban Aquaponics Manual.
I planted tomatoes, from same flat, same day, same greenhouse, same sun, watered, good dirt with AP, not as much certainly.
AP tomatoes were ripe 2 wks before dirt. Eventually, dirt caught up, passed AP, not enough FP water, to sustain tomatoes, plus other plants, were falling over in bamboo troughs.
Fruit was comparable, size , taste.
Wish I had compared root balls afterward, it's nice to have empirical, instead of antidotal, data. Pete