Propagation by Division

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Information about Propagation by Division

Published on January 18, 2009

Author: sherylwil

Source: slideshare.net

Description

Propagation by Division

PROPAGATION BY DIVISION Presented by Sheryl Williams Spring 2002

What is Division? Separation of the crown of a plant into smaller pieces for propagation or to rejuvenate a plant Each piece must have at least one bud (or eye) for new growth and Some roots

Separation of the crown of a plant into smaller pieces for propagation or to rejuvenate a plant

Each piece must have at least one bud (or eye) for new growth and

Some roots

Benefits of Division Rejuvenate mature plants Acquire several small portions complete with Roots Shoots Can immediately be planted as new plants

Rejuvenate mature plants

Acquire several small portions complete with

Roots

Shoots

Can immediately be planted as new plants

What Cannot be divided? Species that do not form a crown or have underground stems. Candytuft, Iberis , grows entirely from a single stem, like a little tree. Lavender and rosemary are the same.

Species that do not form a crown or have underground stems.

Candytuft, Iberis , grows entirely from a single stem, like a little tree.

Lavender and rosemary are the same.

When to Divide Rule is: If it blooms in Spring, divide in Fall If it blooms in Fall, divide in Spring When the plants are not in active growth If flower in spring, wait until they have bloomed Avoid extreme heat or cold

Rule is:

If it blooms in Spring, divide in Fall

If it blooms in Fall, divide in Spring

When the plants are not in active growth

If flower in spring, wait until they have bloomed

Avoid extreme heat or cold

How do we know if a plant needs to be divided? Has the plant outgrown it’s allotted space? Has the number of flowers decreased over the last few years? Does the plant flop open? Does the plant have an open center?

Has the plant outgrown it’s allotted space?

Has the number of flowers decreased over the last few years?

Does the plant flop open?

Does the plant have an open center?

Divide when a plant has outgrown it’s spot

Divide when a plant flops open in the middle Clara Curtis Chrysanthe-mum

Clara Curtis Chrysanthe-mum

Why does this happen? Perennials are non woody plants Majority make their new growth from the base, or crown Majority roots or rhizomes spread Plants form clumps

Perennials are non woody plants

Majority make their new growth from the base, or crown

Majority roots or rhizomes spread

Plants form clumps

How plants grow – example Alfalfa crown The crown is the over wintering stem tissue The crown and root tissue store carbohydrates (food) produced through photosynthesis Crown buds produce the vegetative regrowth following harvest or Produce branch rhizomes.

The crown is the over wintering stem tissue

The crown and root tissue store carbohydrates (food) produced through photosynthesis

Crown buds produce the vegetative regrowth following harvest or

Produce branch rhizomes.

Alfalfa crown 2 Branch rhizome is the structure from which new growth will initiate in the spring The Branch rhizomes grow outward and upward increasing the circumference of the plant The crown increases in size each year.

Branch rhizome is the structure from which new growth will initiate in the spring

The Branch rhizomes grow outward and upward increasing the circumference of the plant

The crown increases in size each year.

Alfalfa plant diagram

Lab 1 – Examine the samples What kind of structure do you have? Spreading Clumping Fleshy Rhizome

What kind of structure do you have?

Spreading

Clumping

Fleshy

Rhizome

How a plant dies out in the middle

Prepare to Divide Prepare beds for the new plants ahead of time, adding organic matter and fertilizer If you can’t replant immediately, heel in your divisions while you are preparing the beds Replant as soon as possible

Prepare beds for the new plants ahead of time, adding organic matter and fertilizer

If you can’t replant immediately, heel in your divisions while you are preparing the beds

Replant as soon as possible

Dig up the Plant Carefully pry up the plant, inserting the fork at an angle several inches outside Work all around the plant, lifting gently until the clump comes free from the soil.

Carefully pry up the plant, inserting the fork at an angle several inches outside

Work all around the plant, lifting gently until the clump comes free from the soil.

Set the plant down and slice through the crown Use a spade if the plant is woody. Divide the clump into as many smaller pieces as desired Be sure each piece has vigorous shoots

Use a spade if the plant is woody.

Divide the clump into as many smaller pieces as desired

Be sure each piece has vigorous shoots

How to Divide Cut away the woody or hard, unproductive center of the old plant, using shoots only from the outer part of the clump Shake or wash them free of soil You can see the natural lines of division Avoid damaging the roots, buds or shoots

Cut away the woody or hard, unproductive center of the old plant, using shoots only from the outer part of the clump

Shake or wash them free of soil

You can see the natural lines of division

Avoid damaging the roots, buds or shoots

Prune Back Any dead or damaged foliage Trim some of the top if the top is too lush for the roots Plant divisions at the same depth as the original plant

Any dead or damaged foliage

Trim some of the top if the top is too lush for the roots

Plant divisions at the same depth as the original plant

Don’t let the roots dry out Heel the cuttings in Either moist soil mix or peat Plastic storage crates are great

Heel the cuttings in

Either moist soil mix or peat

Plastic storage crates are great

How to Divide small plants Small plants can be pulled apart

Small plants can be pulled apart

Back to Back Garden Forks Great for large fibrous-rooted perennials. Place garden forks back to back and lever the forks back and forth to loosen the roots.

Great for large fibrous-rooted perennials.

Place garden forks back to back and lever the forks back and forth to loosen the roots.

Rhizomes can be cut apart with a knife

Autumn Joy Sedum Cut in half

Cut in half

 

Techniques for Dividing Perennials List courtesy of Fine Gardening Magazine http://Taunton.com/finegardening/pages/g00022.asp Chart of which tool to use to divide which perennial Also includes some perennials to leave alone

List courtesy of Fine Gardening Magazine

http://Taunton.com/finegardening/pages/g00022.asp

Chart of which tool to use to divide which perennial

Also includes some perennials to leave alone

How to Plant your new divisions Cover plants with sun protection Burlap Boxes Paper pots Apply mulch

Cover plants with sun protection

Burlap

Boxes

Paper pots

Apply mulch

Where to get more information American Horticultural Society, Plant Propagation, Alan Toogood Editor in Chief The Well Tended Perennial Garden; Planting and Pruning Techniques by Tracy DiSabato-Aust

American Horticultural Society, Plant Propagation, Alan Toogood Editor in Chief

The Well Tended Perennial Garden; Planting and Pruning Techniques by Tracy DiSabato-Aust

Helpful websites http://ag.arizona.edu/pubs/garden/mg/botany/plantparts.html plant botany for lay people http://www.savvygardener.com/Features/when_to_didvide_perennials.html (yes it is spelled incorrectly) chart of when to divide plants http://behnke.com/Library/perenniallibrary.htmlDifferent methods of propagating plants

http://ag.arizona.edu/pubs/garden/mg/botany/plantparts.html plant botany for lay people

http://www.savvygardener.com/Features/when_to_didvide_perennials.html (yes it is spelled incorrectly) chart of when to divide plants

http://behnke.com/Library/perenniallibrary.htmlDifferent methods of propagating plants

 

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