Propagation

Aggie Horticulture - Asexual Plant Reproduction
An overview of reproduction by grafting, budding, layering and micropropagation.
http://aggie-horticulture.tamu.edu/propagation/propagation.html

Alpines From Seed
Alpine plant enthusiast gives tips on raising bulbs and alpines from seed, including a section on gibberellic acid.
http://freespace.virgin.net/almond.jim/alpseed.htm

Australian National Botanic Gardens - Growing ferns from spores
Description of collecting and sowing spores, potting the fonds and includes a drawing of the fern life cycle.
http://www.anbg.gov.au/ferns/fern.spore.prop.html

Australian National Botanic Gardens - How to Propagate Australian Plants
Describes the collection and germinations of seeds, propagation by cuttings, safe use of growth hormones and a growing plants glossary with drawings.
http://www.anbg.gov.au/PROPGATE/plant01.htm

Cornell University, Cooperative Extension - Propagation of Houseplants
Describes various methods utilizing cuttings, the rooting media, and containers for cutting.
http://counties.cce.cornell.edu/suffolk/grownet/indoor-plants/propagation.htm

Gardenweb: Growing from Seed
Forum for discussion of seed-starting topics by gardeners of all experience levels. Particularly active in winter and spring. FAQ includes many tips from home gardeners on variety of topics.
http://forums2.gardenweb.com/forums/seed/

GardenWeb: Winter Sowing
A forum for discussing all aspects of winter-sowing, the planting of seeds in containers outdoors in winter, for germination in spring. The FAQ includes a detailed explanation of the method.
http://forums2.gardenweb.com/forums/wtrsow/

Germination Database - Seeds
Provides a listing of plant names and the methods to germinate the seed.
http://www.backyardgardener.com/tm1.html

Gibberellic Acid for Fruit Set and Seed Germination
Gibberellins are potent growth hormones sometimes used to induce germination in recalcitrant seeds. This article by John M. Riley discusses uses and provides some basic recipes.
http://www.crfg.org/tidbits/gibberellic.html

Gibberellic Acid-3 Information Kit
Background information on using the plant hormone to induce germination, with instructions for two methods, as well as safety information. Also sells kits for the home gardener.
http://www.jlhudsonseeds.net/GibberellicAcid.htm

Grow a Pine Tree From Seed
Detailed instructions on the entire process from seed collection and viability testing to sowing and maintenance the seedlings. Primary focus is on Coulter pine.
http://www.desertmud.com/articles_details/ArticleID/1

Harry Lawson, Chrysanthemum Raiser
Features books, breeding tips, photo gallery, and information on pests and diseases.
http://www.harrylawson.me.uk/

Hawaiian Native Plant Propagation Database
Information on propagation techniques for selected Hawaiian indigenous and endemic plants.
http://pdcs.ctahr.hawaii.edu:591/hawnprop/

Henry Kuska
Retired professor presents in-depth information on his rose hybridizing and germination techniques, along with photos of the results.
http://home.neo.rr.com/kuska/

How to Germinate Seed
Bonsai enthusiast Brent Walston explains the fundamentals of germinating woody species, emphasizing the requirement to break down germination inhibitors.
http://www.evergreengardenworks.com/seed.htm

Jelitto Germination Tips and Tricks
Provides insight on germinating seeds.
http://www.jelitto.com/

Landscape Propagation
Provides instructions on how to reproduce plants including amaryllis, narcissus, daffodils, lilies (by bulb section, scales and seed) and perennials, house plants, roses, vines, trees and shrubs (by root, stem and leaf cuttings).
http://www.landspro.com/

NC State University - Leaf, Cane and Root Cuttings
Provides descriptions with drawings of leaf with petiole, leaf without petiole, split vein leaf, leaf bud, cane and root cuttings.
http://www.ces.ncsu.edu/depts/hort/hil/hil-8700.html

NC State University - Stem Cutting
Home gardener instructions for plant propagation by stem cuttings including a table of evergreen plants and deciduous trees by common name and type of cutting.
http://www.ces.ncsu.edu/depts/hort/hil/hil-8702.html

Nearing Frames
Information and measured plants for constructing a coop-style Nearing frame for propagating woody plants from cuttings.
http://users.stargate.net/~rocketmn/nearing.htm

Ohio State University Extension - Master Gardener
Detailed information on seed raising, as well as other propagation methods.
http://www.hcs.ohio-state.edu/mg/manual/prop.htm

Ontario Rock Garden Society
The germination guide on this society's site lists requirements for a large number of plants (not just alpines), down to species level.
http://www.onrockgarden.com/

Orchid Reserve, El Pahuma - Orchids
Describes techniques employed for raising orchids from seedlings and includes a link to download Orchid Propagation Manual.
http://www.ceiba.org/propagation.htm

Plant Propagation
Demonstrates the basics of plant propagation using stem cuttings.
http://istover.com

Plant Tissue Culture for Home Gardeners
Fact sheet from the University of New England (Australia) explains the required supplies, media, and operational steps to propagate plants by this micropropagation method.
http://www.une.edu.au/agss/hort/horticultural-science.php

Seed and Sower
Ontario gardener shares her experience starting and collecting flower seed in the garden. Also some information on other gardening topics.
http://www.seedandsower.com/

Seed Germination of Wild and Cultivated Roses
Article by Patricia Holloway on harvesting, preparing and sowing rose seeds, including warm and cold stratification, reprinted by the Alaska Rose Society.
http://www.alaskarosesociety.org/documents/seed_germ1.htm

The Seed Site
Harvesting, sowing, and a germination database of over 1000 plants, images of seeds, seedpods, seedlings, and botanical information.
http://www.theseedsite.co.uk/

Seed Swap Links
A page full of links to seed swapping sites.
http://www.geocities.com/missbanji/seedswapping.html

Society for Growing Australian Plants - Native Plants
Provides simple techniques for plant reproduction from seed, cuttings, grafting and division with particular reference to the propagation of Australian native plants and includes diagrams and photographs.
http://asgap.org.au/propagat.html

Starting Plants From Seed
Home gardener describes his method for germinating seeds using moist filter papers and ziplock baggies. Also detailed germination information for many plant species.
http://www.robsplants.com/seed/starting.php

The Succulent Plant Page - Succulent Plants
Describes how to take cuttings, make divisions, take offsets and various methods of grafting.
http://www.succulent-plant.com/propagation.html

Texas A&M University - Mutated Plant Propagation
Describes the origin, development and propagation of chimeras which includes such plants as variegated plants, thornless blackberries and peaches without fuzz.
http://aggie-horticulture.tamu.edu/tisscult/chimeras/chimeralec/chimeras.html

Tom Clothier's Garden Walk and Talk
Most extensive online resource for seed germination information for specific plant species, including indexes for annuals/biennials, perennials, and shrubs/trees. Also general information on seed-starting techniques.
http://tomclothier.hort.net/

University of Georgia -Propagating House Plants
Sexual propagation by seed and spores and asexual propagation by separation and division, cuttings, layering, grafting and budding and micropropagation/tissue culture.
http://pubs.caes.uga.edu/caespubs/pubcd/L290-w.htm

University of Missouri - House Plants
Describes various methods of cuttings, division and layering techniques (with pictures) and a chart of propagation techniques listed by common plant name.
http://extension.missouri.edu/xplor/agguides/hort/g06560.htm

Virginia Cooperative Extension - House Plants from Seed
Discusses the benefits of seed propagation, how to plant the seeds and how to care for the seedlings.
http://www.ext.vt.edu/departments/envirohort/articles/indoor_plants/seedprop.html

Virtual Seeds & Flags
Small-scale seed supplier offers her down-home tips on seed-starting on the cheap, with general information as well as specifics on tomatoes, perennials, fall propagation, and seed-saving.
http://www.virtualseeds.com/SeedStarting.html

Wintersown.org
Winter sowing is a method of starting hardy seedlings outside during winter. This site, constructed by one of the method's gurus, documents which seeds are amenable and how to go about it.
http://wintersown.org/