November 6, 2008
Key (for easy reference)
Group A – Last year’s wood
Group B – Current season’s lignified wood
Group C – Last year’s wood (chilled 1 week)
Group D – Current season’s lignified wood (chilled 1 week)
Group E – Green current season wood
Group F – Green current season wood (chilled 1 week)
Roots have formed on the remaining 2 Group E cuttings. Based upon the length of the roots it is estimated that one formed yesterday and one formed two days ago. This group has now all rooted. The roots appeared at days 19, 21, 31 and 32 into the heating cycle. The average rooting time was 25.8 days with a standard deviation of 5.8 days indicating a high variability in the rooting times for this group.
Roots have also formed on the remaining 3 Group F cuttings. Based upon the length of the roots, it is estimated that they formed two days ago for two of the cuttings and three days ago for the other. This group has now all rooted. One observation noted was that the very fine root “hairs” had attached themselves to the damp newspaper. In most cases they were removed without visibly damaging the roots but I expect that some damage did occur. Soaking the area of attachment with water helped loosen the roots from the paper. The roots in this group appeared at days 19, 23, 24 and 24 days into the heating cycle. The average rooting time was 22.5 days with a standard deviation of 2.1 days indicating less variability and slightly sooner rooting for the chilled group (comparing complimentary groups E and F).
No other roots were observed for the other groups. This is rather surprising that all the “green” cuttings rooted before the “woody” cuttings (exception being the outlier observed in Group A at 13 days). All these cuttings show advanced leaf and branch growth but no roots.