Authors: Charles R. O'Dell Extension Horticulturist, Department of Horticulture, Virginia Tech; Jerry Williams, Teaching Hortculturist, Department of Horticulture, Virginia Tech
Publication Number 438-018, Posted March 2000
TABLE 9 - Sufficiency ranges for petiole sap N and K Concentrations for Strawberries (from Univ. of Florida Extension Circular 1141, 9/94, George Hochmuth and Earl Albregts)
| Month (SW Va.) | No3-N | K |
|---|---|---|
| mid-October | 800-900 | 3000-5000 |
| mid-November | 600-800 | 3000-3500 |
| mid-March | 600-800 | 2500-3500 |
| April 10 | 300-500 | 2000-2500 |
| May 10 | 200-500 | 1800-2500 |
| June 1 | 200-500 | 1500-2000 |
Petiole sap testing for nitrate nitrogen should be backed up by routine tissue analyses of whole leaves by a tissue testing laboratory. Sufficiency ranges for all plant nutrients in whole strawberry leaves are presented in Table 8.
Return to Hill System Plastic Mulched Strawberry Production Guide for Colder Areas