The Rubus 1 group was crippled on Christmas Eve by slime moulds which drained the nutrients from the soil, withering the leaves and leaving them with blackened stems. There's nothing I can do within the parameters of the experiment to revive them, but nor do I want to let them die. For the purposes of the experiment, the Rubus 1 cohort is "dead". If I keep them in the experiment then they'll die anyway, so it all comes to the same as far as the experiments are concerned. I'll give them some intensive care, maybe I'll try using a UV lamp to nuke the fungus, but anything I do to correct this will mean they cannot be admitted to the study from this point on.
No other plants moved up a rounding bound over Christmas.