Perry's Perennial Pages

Propagation Methods for Herbaceous Perennials--R

A | B | C | D | E | F | G | H | I, J, K | L | M | N, O | P | R | S | T | U,V,W, X,Y,Z

The following table contains temperate and sub-tropical (to USDA zone 9) herbaceous genera and species. Some may be quite rare and only found on a continent or country such as Australia or South Africa. Due to variations in references, some may contain more than one comment or time period for a method.

Methods of Propagation:
S = seed LC = leaf cutting
SC = stem cutting L = layering
RC = root cutting TC = tissue culture or micropropagation
D = division

This table is an updated and expanded version of the printed version which can be found in the NRAES book by Dr. Leonard Perry, Herbaceous Perennial Production.  Appreciation is expressed to Andrea Luchini, graduate assistant, for most of this update.


Scientific Name

Common Name

Methods of Propagation

Time Period

Comments/Requirements

Raffenaldia primuloides

 

S

 

deep pots

 

Ramischia: see Orthilia

 

 

 

 

 

Ramonda sp.

Pyrenean Primrose

S

 

seedlings slow

 

 

 

SC

 

 

 

 

 

LC

 

as Saintpaulia

 

 

 

D

 

old clumps

 

Ranunculus sp.

Buttercup

S

 

fresh, not of selections

 

 

 

D

fall, early spring

requires constant moisture

 

R. asiaticus

Turban, Persian ranunculus

S

 

common

 

 

 

D

 

tuberous root

 

 

 

TC

 

 

 

Ranzania japonica

 

D

 

difficult to transplant

 

 

 

S

 

4 years to flower

 

Raoulia sp.

 

D

 

of rooted tufts

 

 

 

SC

 

softwood, loamy mix

 

 

 

S

 

must be fresh, low germ

 

Ratibida sp.

Prairie Coneflower

D

spring

deep tap roots, difficult

 

 

 

S

 

best sown direct

 

Rehmannia sp.

 

RC

late fall, early winter

 

 

 

 

S

 

biennials where cool

 

 

 

SC

 

basal shoots

 

Reineckea carnea

 

D

fall, spring

 

 

 

 

S

 

 

 

Reseda sp.

Mignonette

S

spring

also fall where warm, direct

 

 

 

SC

summer

 

 

Reynoutria: see Fallopia

 

 

 

 

 

Rhaponticum: see Leuzea

 

 

 

 

 

Rhazya: see Amsonia

 

 

 

 

 

Rheum sp.

Rhubarb

S

fall

hybrids likely

 

 

 

D

spring

ensure a dormant crown bud per

 

Rhexia sp.

Meadow Beauty

D

spring

 

 

 

 

S

 

 

 

Rhinopetalum: see Fritillaria

 

 

 

 

 

Rhodiola sp.

 

SC

summer

non-flw, basal, spring

 

 

 

LC

 

 

 

 

 

D

summer

also offsets

 

 

 

S

 

species only

 

Rhodohypoxis sp.

Red Star

D

early spring

or by offsets

 

 

 

S

 

variable seedlings

 

Riccia fluitans

Crystalwort

D

 

 

 

Rindera sp.

 

S

 

short-lived plants, dry site

 

Rodgersia sp.

 

D

early spring

 

 

 

 

S

spring

hybrids likely

 

Rohdea japonica

Lily of China

D

 

rhizomes, difficult

 

 

 

S

 

rare, not of clones

 

Romanzoffia sp.

 

D

 

separate dormant tuberous rhizomes

 

 

 

S

 

 

 

Romneya sp.

California Tree Poppy

S

early spring

slow, sow ripe

 

 

 

D

 

difficult, suckers with roots

 

 

 

RC

late winter

pencil-thick, use care

 

Romulea sp.

 

D

 

offsets

 

 

 

S

fall

spring for R. macowanii

 

Rorippa sp.

Great Yellowcress

SC

 

keep wet

 

Roscoea sp.

 

D

early spring

peaty mix

 

 

 

S

 

 

 

Rosmarinus officinalis

Rosemary

SC

summer

softwood or semi-ripe

 

Rosularia sp.

 

D

 

some sp. prefer dry soil

 

Rubia tinctorum

Madder

S

 

 

 

 

 

D

 

as Galium

 

Rubus sp.

Brambles

S

spring

ripe, stratify, some hybridize

 

 

 

D

spring, fall

suckering sp.

 

 

 

SC

 

 

 

 

 

L

 

some sp.

 

R. flagellaris

Northern Dewberry

SC

winter

cuttings when plant dormant

 

R. parviflorus

Thimbleberry

SC

summer

semi-hardwood; rooting hormone

 

R. spectabilis

Salmonberry

SC

winter

hardwood; rooting hormone

 

R. ursinus

California Blackberry

SC

winter

hardwood; 4 nodes, rooting hormone

 

Rudbeckia sp.

Coneflower

TC

 

 

 

 

 

S

 

species, ‘Goldsturm’, hirta

 

 

 

SC

spring

with root pieces attached, or as stems lengthening

 

 

 

D

spring, fall

also rooted basal stems

 

Ruellia sp.

 

S

 

bottom heat

 

 

 

SC, D

 

 

 

Rumex sp.

Dock, Sorrel

S

spring

 

 

 

 

D

 

also flow stem offshoots

 

Rupicapnos africana

 

S

 

self sows, collect early

 

 

 

D

early spring

use care

 

Ruta sp.

Rue

SC

early fall

photodermititis from sap

 

 

 

S

 

ripe

 

 

 

L

 

old plants

 

Rydbergia: see Hymenoxys

 

 

 

 

 


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