You are here: Small Containers > Interpretation
Interpreting the Results
Interpretation of results depends upon the grower's objective or reason for sampling.
One reason to test is to ensure that optimal concentrations of nutrients are in substrate. Optimal concentrations for specific nutrients are given in a table linked below. However:
- Optimal electrical conductivities for woody ornamentals grown outdoors or under shade are 1.0 to 1.5 deciSiemens per meter or millimhos per centimeter. (View table)
- Optimal electrical conductivities for herbaceous or bedding plants and interior plants grown in a greenhouse are 2.0 to 3.5 deciSiemens per meter or millimhos per centimeter. (View Table)
Another reason to test is to fulfill the substrate-monitoring requirement for growers complying with the interim measure for Florida producers of container-grown plants. Optimal nitrate nitrogen concentrations are given in a table linked below. However, optimal electrical conductivities for woody ornamentals grown outdoors or under shade are 0.8 to 1.5 deciSiemens per meter or millimhos per centimeter. Optimal electrical conductivities for herbaceous or bedding plants and interior plants grown in a greenhouse are 1.5 to 2.8 deciSiemens per meter or millimhos per centimeter. (View Table)
Note
Plant nutrient requirements can vary according to genera and other environmental factors so some judgment based on experience is best.
