generally with most plants:
- if watered too much the leaves turn yellow
- if not watered enough leaves turn brown
I would agree...last year mine didn't get watered for a week in very hot dry weather and I really thought many of them died. The leaves turned brown and fell off but I started watering them like crazy and 95% of them sprouted new leaves and eventually came back!
The RM cells are very small and of course perforated making it impossible for them to "hold" water unless very heavy clay like soils are used. The potting mix soils are actually "soilless" and designed to absorb and retain moisture but in a vented container could never hold enough water to drown seedlings.
This is something we need to explore in depth and determine why some of us are finding different results?
How long can trees go between watering give the same soil medium in the same RM cells?
Is there a difference in growth if different soil mediums are used and varying amounts of water used?
Phil was kind enough to send me some Root Trapper bags and I took his advice and mixed up a more normal soil mixture. In those bags my Kazak and Concordia trees are thriving despite being outside in constant relentless flooding rains and I have left them for a week in hot dry weather without watering...very different of course then the tiny RM starting cells.
I have Eastern Gamagrass growing in the very small 32 cell RM cells and they can not last a day in hot dry weather without watering using the soilless potting mix.
The whole idea behind the RM cells is to grow the seedlings until the root systems completely displace the soil, all the while growing outward rather then swirling in circles and becoming root bound.
My feeling is this...corn can be grown with out irrigation, but yields can be significantly higher when the crop has an almost constant source of water. Combined with proper nutrient levels, peak yields can be achieved...that same principle I believe can be applied here.
Constant watering combined with fertilizers like Osmokote and MiracleGro can force more rapid and aggressive growth. The RM seedlings I planted last fall (started in the spring) have far outpaced and seedlings started from seed by planting them conventionally.
Those growing a few seedlings just for fun may not be concerned with much of this, but others (like myself) are hoping for maximum growth from seedling to fist mast production...in which case aggressive watering and feeding can help us achieve that.
Share the type of soils you use in your cells and how often you typically water during hot summer months (80 degrees and up) and how often you use any added nutrients....