ISHS Acta Horticulturae 205: Symposium on the Development of New Floricultural Crops, XXII IHC
SPACING OF FIELD GROWN PERENNIAL CROPS - AN INTERIM REPORT |
| Author: | A.M. Armitage |
| Abstract:
Achillea 'Coronation Gold', Achillea millefolium 'Rose Beauty', and Physostegia virginiana were all planted on 30, 60, 90 or 120 cm centers. Data were collected for 2 or 3 years depending on species. In all cases the number of flowering stems per plant increased but the number of stems per square meter decreased as spacing increased. Stem lengths of Achillea 'Coronation Gold', Achillea millefolium 'Rose Beauty' and Physostegia virginiana were significantly affected by spacing but flower size and stem diameter remained unchanged regardless of planting distance. | |
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