Bill Argo
Bill Argo is technical manager of Blackmore Co. You can eMail him at [email protected].
Understanding Plant Nutrition: Geranium Nutrition
Seed and zonal geraniums are iron-efficient crops that are prone to iron/manganese toxicity when the media-pH gets too […]
Understanding Plant Nutrition: Calibrachoa
Calibrachoa are often described as a “high feed” or “high iron” requiring crop. This is not exactly true. […]
Understanding Plant Nutrition: Stock Plant Nutrition
Nutrient management for stock plants is similar to other long-term crops. We have worked with several leading stock […]
Understanding Plant Nutrition: Poinsettias
Profit margins are extremely tight for poinsettias, so minimizing shrinkage that results from crop losses is essential. If […]
Understanding Plant Nutrition: Environmentally Induced Plants
Most nutrients are actively taken up by the plant from the soil solution. With active uptake, the plant […]
Understanding Plant Nutrition: Common High Media-EC Problems
High electrical conductivity (EC) in the growing medium makes it harder for roots to take up nutrients and […]
Understanding Plant Nutrition: Low Media-EC
When growers talk about “lack of feed” or “hungry plants” (Figure 1), the issue is usually insufficient supply […]
Understanding Plant Nutrition: High ph Problems
High media-pH (above 6.4) induced iron deficiency is the most common nutritional problem for certain iron-inefficient crops (Figure […]
Understanding Plant Nutrition: Correcting Low Media pH
Iron/manganese toxicity is a common problem when media-pH drops below the ideal level in certain crops, including geraniums, […]
Understanding Plant Nutrition: The Series
Understanding Plant Nutrition: An Introduction Read about the basics on essential nutrients for plant growth, uptake of nutrients […]
Understanding Plant Nutrition: Managing Media EC
High fertilizer levels can be too much of a good thing, leading to excess growth, nutrient toxicity and […]
Understanding Plant Nutrition: Managing Media pH
Managing the pH of container media is a challenge in the greenhouse and nursery industry. Many growers face […]
Understanding Plant Nutrition: Controlled- And Slow-Release Fertilizers
Using controlled-release (CRF) and slow-release (SRF) fertilizers allows growers to supply nutrients for an extended duration without the […]
Understanding Plant Nutrition: Fertilizers And Micronutrients
Micronutrient (iron, manganese, zinc, copper, boron and molybdenum) nutrition is different from managing macronutrients, such as nitrogen, in […]
Understanding Plant Nutrition: Fertilizers And Macronutrients
When you select a water-soluble fertilizer, the primary goal should be to supply plants with a sufficient amount […]
Understanding Plant Nutrition: Fertilizers And Media pH
Choosing fertilizers can be one of the most important decisions you can make for managing the media pH […]
Improving Rewetting
Once mixed containers or baskets are sold to a customer, their subsequent watering greatly affects the “use by” […]
Fertilizing Containers
After water management, fertilization is the next most common problem with keeping large containerized plants alive through the […]
Combining Plants Based On Tolerances
Plants may look good together in combination baskets, however the success of a mixed container depends on more […]