Propagation/Greenhouse ManagementUnit 1.3 | Part 1 – 141
Resources
extension.umass.edu/floriculture/fact-sheets/
organic-greenhouse-production-and-resources
Provides information and links to a wide array
of topics germane to organic growers, including
biocontrol, growing media and fertility inputs.
extension.umass.edu/floriculture/greenhouse-
best-management-practices-bmp-manual
Provides link to lengthy publication on Best
Management Practices for greenhouses. Focus is
on conventional production, but contains lots of
information relevant to organic production.SEED COMPANIES
The following sources offer exclusively GMO-free
varieties, specify if their seed is fungicide treated,
and can supply letters for your Certifier stating that
your purchases are in compliance with the USDA’s
National Organic Program (NOP) regulations.
Baker Creek Heirloom Seeds
http://www.rareseeds.com
Large collection of heirloom and difficult-to-find
vegetable seeds.Botanical Interests
botanicalinterests.com
Purveyor of vegetable, flower, and herb seeds,
many organic and heirloom varieties.Bountiful Gardens
http://www.bountifulgardens.org
Vegetable and small grain seeds, seeds for
compost biomass production, principally open-
pollinated varieties, nutritionally dense crops.Fedco
http://www.fedcoseeds.com
Vegetable, flower, and herb seeds, tubers and
allium bulbs, many organic and open pollinated
varieties.Fred C. Gloeckner Co.
http://www.fredgloeckner.com
Flower seeds, bulbs, plug broker, and grower
supplies.Geo Seed
http://www.geoseed.com
Flower, ornamental grass, and perennial seeds
for cut flower growers.eXtension, Organic Potting Mixes
http://www.extension.org/pages/20982/organic-pot-
ting-mix-basics#.VN0ZB7DF_v6
Covers basic information about organic potting
mixes for organic farming systems.Integrated Pest Management, UC Davis
http://www.ipm.ucdavis.edu
Excellent resource for insect identification and
non-chemical control strategies, as well as
links to other sites concerned with pests and
pathogens. While focused on California, the
content is highly transferable to growers in
other regions.New York State/Cornell IPM Program
http://www.nysipm.cornell.edu
Valuable resource covering many fruit and
vegetable crops, including identification
information, cultural practices and inputs to
manage pests and diseases.Royal Horticultural Society
http://www.rhs.org.uk/Advice/Profile?PID=710
Provides clear definition of F1 Hybrids and
explanation of how F1 Hybrids are produced, as
contrasted with open pollinated seed varieties.
http://www.rhs.org.uk/advice/profile?PID=501
Provides straightforward explanation of
methods and conditions for growing seedlings
indoors.Soil Foodweb
http://www.soilfoodweb.com
A clearinghouse for information and research
summaries on soil ecosystem process and a
product, services and resource for how to grow
crop plants without the use of pesticides or
inorganic fertilizers. Includes how-to manuals
on the production of compost teas.University of Massachusetts Extension Greenhouse
Crops and Floriculture Program
extension.umass.edu/floriculture/fact-sheets/
greenhouse-management-engineering
Links to many valuable website pages for
organic and conventional greenhouse producers
on design, energy efficiency, water management,
environmental management, pest and disease
monitoring, and more.