1973 Volume 36 Issue 2 Pages 16-24
As regards following questionable problems in case of using Hedera genus for landscape planting, we tried to collect basal data on research and experimence.
1) Propagation of Hedera genus:
5 propagation way are cutting, seedling, grafting, layering and stock-dividing.
We made experiment on cutting and seedling thought to be the most suitable method for practical use. As for cutting, we use H. rhombea Bean as experimental material and made the cutting experimence 12 times a year.
The result that suitable temper range for the cutting of H. rhombea Bean is from 15°c to 24°c was provided.
By the way we expect this is applicable to other kinds.
Besides, difference of root ratio by varied soils used for cutting have a little or no remarkable difference. As for seedling, H. rhombea Bean seeds sprinkle well germinating rate, 95% was succeeded.
The period of sprinkle is from April to May that is just same as the period of growing seeds.
2) On negativity and positivity:
On judgement negativity or positivity from difference of growth under each conditions made by cutting the sun light using “KANREISYA”.
The well-growing kinds in the shade are H. helix “Fan”, H. helix “Glacier”, H. helix “Mandas Crested” and H.rhombea Bean.
And those in the slight shade are H.helix “Golddust” and H. helix “Pittsburgh”.
H. helix L. grows well in the sun
3) Resistance against cold:
3) Resistance against cold:
From total judgement, we could hold the evidence that H. canariensis “Variegata” is less persistent against cold than other kinds of Hedera genus, and 2 kinds, H.helix “Fan” and H. helix “Mandas Crested”, are more persistent.
4) Difference of growing degree:
According to observation of experimental farm and experimence for growth, we made ranking as follows; (1) H. helix “Mandas Crested” (2) H. helix L.(3) H. helix “Fan” (4) H.helix “Pittsburgh”, H. helix “Star”, H.canariensis “Variegata” (7) H. helix “Glacier”, H, helix “Golddust” H. rhombea Bean (10) H.helix “Discolor” (11) H.helix “Williamsiana” (12) H.helix “Scutifolia”. H.hlix “Mandas Crested” generally made extremely good growth and seemed to be the most suitable landscape plants among Hedera genus.
