Grow\'Em Plant Propagation Database
Custom Search
main index
plants index

propagation techniques

growth media

growth enviroment

Seed - General
Chipping Seed
Soaking and Pricking
Pre-sprouting Seed
Stratifying Seed
Cuttings - General
Stem Cuttings
Heel Cuttings
Root Cuttings
Leaf Cuttings
Rooting Hormone
Rooting with Vitamin B1
Rooting with Willow Extract
Dividing Plants
Dividing Orchid Pseudobulbs
Simple Layering
Air Layering
Tip or Trench Layering
Serpentine Layering
Bulbs - General
Bulb Chipping
Bulb Scaling
Twin Scaling
Grafting - General
Cleft or Wedge Grafting
Bud Grafting
Whip Grafting
Side-veneer Grafting
Plants of Home and Garden
Trees and Shrubs
Fruits and Vegetables
Grains and Grasses
Cacti and Succulents
Water Plants
Growth Media
Sphagnum and Peat Moss
Manure, Nitrogen, Potassium
Making Compost
Constructing a Compost Bin
Indoor & Vermicomposting
Compost Tea
Composting Problems
Foliar Feeding
Green Manures
Bone Meal & Other Additives
Manure, Nitrogen, Potassium
Containers and Enclosures
Pots & Potted Plants
Biodegradable Pots
Raised Beds
Cold Frames
Water and Irrigation
Artificial Light
HID Lighting
Aquarium Lighting
On Photosynthesis
Synthetic Mulch
Floating Row Covers
Favorite Gardening Sites
General Information
Specific Interests
Seeds and Seed Catalogs
Gardening Tools
Garden Design
header, pests and organic pest control

image gallery

header, plant of the week

Organic Pest Control
plant hardiness zone maps

plant of the week
image gallery


Stratifying Seed

Stratification or pre-chilling may be required to break dormancy for hard-to-germinate plants, i.e. trees, especially nut trees, or shrubs. For plants that expect two winters before germinating, a double dormancy, a double treatment is required. The easiest way to grow these is to sow them in the fall, ideally in a cold frame for protection and easier observation; let one or more winters pass.

Alternatively, in early winter, mix seeds with builder's sand or some other sterile, well-draining medium and place in clay flowerpot, or perforated plastic pots, and set outside in protected location. When snow clears, empty the pot, and sow swollen seeds either inside or out.

A sterile, moist growing medium may be used for the above technique. Check daily for germination in spring and move to warmer area when this happens. Again, transplant with the first or second set of true leaves.

Where cold winters just don't happen, use the fridge. Mix seed with 2 to 3 times the amount of damp peat moss, damp sand or other sterile medium, and seal well in a plastic bag, leaving plenty of air available. Leave at 60-65F/15-18C for several days then place in the fridge. Check frequently for germination. Keep damp. This treatment may have to be repeated after a warm treatment, with double dormancy.

When any seeds germinate, pot them all. Note that germination can take years, even after stratification. Don't give up hope and don't throw out your seeds.

Some seed may germinate equally well if chilled in the freezer for half the time. However, do not ever commit a significant amount of seed to this, or any other technique, you have not used before.

Topics Referenced

Cold Frames
Sphagnum and Peat Moss
Trees and Shrubs

Don't see what you're looking for? Try our Search function.