Heaving

Heaving: A process of alternating freezing and thawing that causes a plant to partially come out of the ground.

Heaving Lifting of soil and plants due to frost and ice.
Hedge A linear planting of plants as a barrier.

HEAVING - When there is a climate change from frost to warming of the soil, it often causes the soil to buckle upward. Sometimes called frost heaves.

HEAVING: the partial lifting of a plant out of the soil as a result of alternating freezing and thawing of the soil.

HEAVING - The process of a plant being pushed out of the soil that occurs when the ground alternately freezes and thaws in winter.

Prevent Heaving: When the ground repeatedly freezes and thaws, it expands and contracts.

Moving in the fall before the ground freezes is preferable if you don't have a problem with frost heaving.

Frost heaving caused by alternate freezing and thawing of the soil can also a major problem.

When left outdoors, perennials, trees, and shrubs are not only subject to extreme cold and wind, but are also vulnerable to cycles of freezing and thawing that can cause heaving ...

Once the soil has frozen, apply a layer of mulch to help prevent roots from heaving out of the soil during alternate freezing and thawing. If heaving occurs, don't try to force plants back into the soil.

If you live in a warm climate, where frost heaving is not a problem, you can line the bottom of your pond with concrete, brick or even clay.

Check your perennial beds for evidence of heaving as the soil freezes and thaws. Be sure to cover plants with a thick layer of organic mulch to stop any further heaving and to prevent additional drying to the crowns and roots.

The next sign that you should consider transplanting your iris is if the rhizomes start heaving out of the ground.

Mulch for the winter to prevent frost heaving. Plants need excellent drainage to overwinter. Plants are slow to emerge in spring.
More growing information: How to Grow Perennials
Pests: Aphids Diseases: Rust
Bacterial and fungal leaf spots ...

Apply a layer of mulch to prevent frost heaving and to conserve moisture. The small bulbs make the best display when several are grouped in an area, planted closely together and left undisturbed to naturalize. Reseeds readily. May be forced.

Plant Patrol. Watch out for 'heaving', when your pansies, coral bells and other plants pop right out of the ground after cold snaps. Simply press roots back into their proper position as soon as you notice.

Once you've cut back your perennials for the season, add 2-3 inches of mulch after the ground freezes. This prevents heaving, which happens when soil expands by repeated freezing and thawing. Heaving can lift some perennials right out of the soil! ...

Mulch flowers once the ground has frozen - this protects the plants from heaving of the soil, which is caused by the ground freezing, thawing, then re-freezing (heaving disrupts the plant's root system).

To protect plants from winter drying and frost heaving, apply mulches after the ground is frozen. This protects small bulbs by delaying spring growth until weather is warmer and more settled.

Delay soil freezing and prevent frost heaving in winter. Protect plants from damage by equipment. Reduce soil erosion and loss. Hold moisture. Reduce evaporation and runoff. Reduce rot and other soil-borne diseases.

Finally, mulch your newly planted bulbs with two to four inches of organic mulch to keep them from heaving up in the winter. Water them in so that there are no pockets of air and wait for the first shoots to break through the ground in the spring.

Place winter mulch around perennial plants in late fall to insulate the roots during the winter. This will decrease damage to the plant by insulating the ground to prevent winter heaving.

Mulches also suppress the growth of weeds, which reduces the use of herbicides. Additionally, mulches protect shallow-rooted plants from frost heaving and winter injury.
Soil swelling ...

Make sure they get enough moisture and after the soil freezes add 3-4 inches of mulch (straw, pine needles, evergreens) to protect the roots from heaving and freezing temperatures. Mulching is also recommended for newly planted rhizomes.

If you use the slab described, be sure that the soil is porous. Heavy clay or stiff soil will require the building of foundation walls to the frost line to prevent heaving.

Mulch should be used sparingly around bearded iris during the growing season; especially after bloom when a dry period is needed. Avoid mulch in or around the crown to reduce the chance of rot. Winter protection to protect from frost heaving with ...

For a sturdier installation, you can use a base of pea gravel. This keeps the lights from shifting and prevents frost heaving, which occurs when water in the ground freezes and pushes objects upward.

The heaving caused by freezing and thawing conditions will crack and destroy terra cotta and some plastic containers. I've got A LOT of containers out there and would like to keep the collection I've cobbled together for as long as possible.
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See also: Plant, Soil, Spring, Mulch, Water