Author Archives: John M. Dole

About John M. Dole

John M. Dole is a professor and head of the Department of Horticultural Science at North Carolina State University.

Preventing Plug Stunting

We have all heard the cliché doctors make the worst patients. Well, sometimes greenhouse growers make the worst horticulturists. We have learned over the years just how far we can push our plants. A case in point is plugs. They often arrive in large batches, usually when there are not enough folks to transplant them

Cold-Chain Management

Temperature management is the predominant factor that impacts the post-harvest performance of horticultural crops. Over the past several years, we have been working with cutting suppliers to improve the reliability of delivering unrooted cuttings that perform well in propagation. Inevitably, all roads lead back to temperature management. Cutting performance relies on strong cold-chain management. The strength

Calculating Crop Costs

There is no way around it: Profit = Revenue–Expenses. When we need to increase, or more commonly maintain, profit, the only way to do so is by increasing revenue or decreasing expenses. The standard reaction is to target the most obvious expenses–labor, fuel costs, plant materials or drop unprofitable crops and product lines. While that sounds