Under Section 1-1(q) of Connecticut General Statutes, greenhouses and other structures, used primarily for the production of horticultural commodities, are considered agriculture and farming. This fact sheet explores some Regulations and Codes related to commerical greenhouses in Connecticut.

In orchards, excessive rainfall can lead to oversaturated soils, flooding, and standing water. As a result, observations of plant disease caused by soilborne pathogens often coincide. The excessive free moisture in water-logged soils is problematic for many reasons, the first being stress brought on by the plant roots not having access to oxygen.

Whether expanding a greenhouse operation, or building a new one, zoning approval is required. In some communities, especially smaller ones, this may be easy to obtain. In others, a considerable expenditure in time and money may be required. This usually depends on the level of preparedness (including paperwork), the complexity of the regulations and the feelings of neighbors toward the business.

In most sections of the United States, the ‘wind load’ is the greatest force that a greenhouse will be subject to. Wind load can occur from hurricanes, tornados, or a sudden squall from a passing weather front. The wind forces that act on the greenhouse are influenced by numerous factors, including the basic wind speed, building orientation and exposure, height and shape of the greenhouse, and doors or vents that may be open at the time of the wind occurrence.

Late Spring frosts remain one of the most concerning and devastating weather events for fruit producers in the Northeast U.S. With a shifting climate and increasing weather instability, it is important to know what factors influence Spring frosts. Here, critical temperatures, freeze injury and frost protection are explored to help prepare for the future, keeping in mind that extreme weather events like this will likely continue to occur. 

Oedema (edema) or intumescences are lesions that can occur on begonia, ivy geraniums, cactus, cleome, ivy, ornamental sweet potato vine, and annual thunbergia. Broccoli, cabbage, cauliflower, and tomato can also suffer from this disorder. Houseplants with fleshy leaves, such as jade, peperomia and schefflera, may be prone to edema when the environmental conditions are favorable. The target audience of this factsheet is commercial greenhouse growers.

Intumescences is an abiotic disorder that can affect greenhouse-grown tomatoes. It is a physiological disorder, not an infectious disease. It is also known as edema (oedema). The target audience of this fact sheet is commercial greenhouse growers.

Downy mildew on basil was first reported in the United States in 2007, in Florida. By 2008 and 2009, it was widespread in the Northeast. Downy mildew on basil is seed-borne, so infections can begin in the greenhouse. It is also readily spread by air-blown spores. This fact sheet should be of interest to commercial greenhouse growers.

Many of soils throughout Connecticut tend to be more acidic, formed as rocks were ground and deposited by glaciation. The pH of soils cultivated for vegetable growing typically declines (becomes more acidic) gradually from the removal of calcium, magnesium and potassium ions–by leaching and crop uptake–and from the use of acid-forming fertilizers. Testing every year gives a more complete evaluation and is also appropriate when significant changes have been made in the fertilizer program. Reviewing fertilizer labelling is essential.

Both fungus gnats (Bradysia spp.) and shore flies (Scatella stagnalis) occur in the moist environments common in greenhouses. This publication is intended for commercial greenhouse growers.

With temperatures warming as spring approaches each year, many farmers are deep in preparations for the coming season; crop planning, purchasing seed, prepping nurseries, repairing machinery and more. In the midst of this planning one might look over the farm on a sunny day, and wonder, “What am I going to do with all this over-wintered rye cover crop?”

Garlic is a staple crop in the Northeast, but it can be difficult to know exactly when to plant and harvest garlic in this region. There are quite a few important guidelines during all stages of garlic cultivation.

It’s best not to wait until just before you start your spring seedlings, to begin cleaning, removing clutter and organizing your greenhouses.

Fireblight is often one of the top concerns for Connecticut fruit producers. This disease, caused by the bacterium Erwinia amylovora, is both highly destructive and infectious, making informed disease management efforts a top priority.