For greenhouse crops, they should be sown in January with a little basal heat.

He has visited research centers and production centers throughout the world and is constantly studying annuals, perennials, cut flowers, and greenhouse crops in various climates.

Ventilation also ensures a supply of fresh air for photosynthesis and plant respiration, and may enable important pollinators to access the greenhouse crop.

The aphid midge is commercially grown by insectaries for use as biological pest control in commercial greenhouse crops.

The region is also home to a greenhouse industry led by Red Hat Co-op, a producer-run cooperative that markets greenhouse crops.

Colasanti's started producing vegetables and greenhouse crops in 1941, they also had a small fruit stand.

Growers turn greenhouse crops regularly, with five new crops a year, Mr. Weiss said.

One species, Aphidoletes aphidomyza, is an important component of biological control programs for greenhouse crops and is widely sold in the United States of America.

So they spent their days augmenting the soil, and growing greenhouse crops, and planting hardy salt-desert plants.

The deliciously tender, spicy greens are not hydroponic like most greenhouse crops but are grown in soil for better flavor.