nor education 7 min read

By TerraCare

How Long Does Terramation Take? (colloquially referred to as human composting)

If you are asking this question right now, you may be navigating one of the hardest moments of your life. You want to understand what comes next — when you can hold a memorial, when you will receive your loved one’s soil, what the weeks ahead will look like. Those are reasonable, loving questions, and this article will answer them as clearly as possible.

The natural organic reduction (NOR) process — commonly called terramation or natural organic reduction — typically takes approximately 60 to 90 days from start to soil return, depending on the provider and the individual. Established operational NOR facilities describe their processes as taking approximately 60 days to three months, reflecting two phases: an active transformation period followed by a resting and curing period. Your provider will give you a more specific window based on their particular system.

How long does terramation (natural organic reduction) take?

The terramation process typically takes 60 to 90 days from the start of the process to soil return. This breaks into two phases: an active microbial transformation phase lasting roughly 30–50 days, followed by a resting and curing phase of approximately 30 days. The exact timeline varies by provider's vessel design, organic material blend, temperature management, and individual body factors. Providers communicate progress and notify families when soil is ready.

  • Terramation takes approximately 60–90 days from vessel placement to soil return, consisting of an active transformation phase (30–50 days) and a resting/curing phase (approximately 30 days).
  • Timeline varies by provider because vessel design, airflow management, organic material composition, and body factors (mass, age, health) all affect the pace of microbial transformation.
  • Most NOR providers recommend waiting for soil return before scheduling time-sensitive ceremonies, since each person's timeline is unique and may shift by days or weeks.
  • Families typically receive approximately one-half cubic yard of Regenerative Living Soil when the process is complete — nutrient-dense, finished earth ready to plant with or scatter.
  • NOR takes significantly longer than cremation (2–3 hours) or alkaline hydrolysis (6–8 hours), which is the most important timeline expectation to set clearly at the time of arrangement.

--- Established operational NOR facilities describe their processes as taking approximately 60 days to three months, reflecting two phases: an active transformation period followed by a resting and curing period. Your provider will give you a more specific window based on their particular system.

The Two Phases of the Terramation Timeline

Understanding why terramation takes the time it does can make the waiting easier. The process unfolds in two distinct phases, each with its own purpose.

Phase One: Active Transformation

During the first phase, your loved one’s body is placed in a specially designed vessel with a carefully selected mixture of organic materials — typically wood chips, straw, and alfalfa. These materials create the right carbon-to-nitrogen ratio to support microbial activity.

The microbes already present in the organic materials and naturally occurring in the body begin their work. As their activity intensifies, temperatures inside the vessel rise significantly — often to between 131 and 150 degrees Fahrenheit — for a sustained period. This heat is a sign that the transformation is proceeding well, and it also meets public health standards for pathogen reduction, similar to regulated composting operations.

The active phase typically takes roughly 30 to 50 days, depending on the provider’s vessel design, airflow management, and the specific blend of organic materials used — all of which affect the pace of transformation.

For a detailed walkthrough of what is happening inside the vessel at each stage, see our article on what happens during terramation.

Phase Two: Resting and Curing

Once the active transformation is complete, the resulting soil — along with any remaining bone material — moves into a second phase. Bone fragments that did not fully break down during the first phase are separated, processed, and returned to the soil. The finished material then rests and cures in an aerated environment.

This curing period matters: it stabilizes the soil, ensures it is fully finished, and prepares it to support plant life. The resting phase typically lasts approximately 30 days to five weeks, depending on the provider’s system. At the end of this phase, families receive their loved one’s Regenerative Living Soil™ — approximately 1/2 cubic yard of rich, finished soil.

For more on what this soil is and how families use it, see our complete guide to terramation.

What Affects the Timeline?

No two people are identical, and no two terramation timelines are exactly alike. Several factors influence how long the process takes:

The provider’s system and vessel design. Different facilities use different vessel configurations, aeration schedules, and monitoring approaches. Some providers run highly controlled, technologically managed systems; others use a more traditional composting approach. These design choices have real effects on duration.

Temperature and moisture conditions. Microbial activity is sensitive to its environment. Providers carefully monitor temperature and moisture inside the vessel to keep conditions optimal — but slight natural variation still occurs. A vessel running slightly cooler or drier may take longer to complete the active phase.

Organic material composition. The specific blend of wood chips, straw, alfalfa, and any botanicals added by the family influences the carbon-to-nitrogen ratio and, in turn, the pace of decomposition.

Individual body composition. Body mass, age, and overall health at the time of death can all affect how the microbial process proceeds. This is why providers emphasize that each person’s timeline is unique, and why they recommend waiting until soil is returned before scheduling time-sensitive plans.

Facility capacity and scheduling. Depending on the provider’s current caseload and scheduling, there may be a short wait between transport and the start of the process itself.

Planning Around the Timeline: What Families Should Know

For families trying to plan ahead, here is practical guidance based on what providers publicly share.

When to hold a memorial

Most NOR providers specifically recommend waiting until after soil return to schedule time-sensitive ceremonies or travel, since each person’s timeline is unique and can shift by days or a week or two. That said, many families hold a memorial service in the weeks immediately after their loved one’s death, well before soil return, and then hold a smaller ceremony later when they plant or scatter the soil. You do not need to wait for the soil to gather together and begin grieving.

The terramation process explained article covers what families can expect from first call through to soil return, which may help with early planning conversations.

When to expect your soil

Based on publicly available provider information, families can generally expect to receive their loved one’s soil within 60 to 90 days of the process beginning. Some providers may complete the process in closer to 60 days; others, particularly those with a longer curing period, may take closer to 90. Your provider will keep you informed as the process moves through its phases, and will contact you when the soil is ready.

What you will receive

At the end of the process, families receive approximately 1/2 cubic yard of Regenerative Living Soil of nutrient-rich, finished soil, about the volume of a large wheelbarrow. This is not ash. It is genuinely fertile material, capable of supporting plant life and ready to return to the earth.

NOR is currently legal in 14 states: Washington, Colorado, Oregon, Vermont, California, Nevada, Arizona, Maryland, Delaware, Minnesota, Maine, Georgia, New York, and New Jersey. However, California, New York, and New Jersey are legal but not yet fully operational — services are not yet available in those states. For current state-by-state information, see states where NOR is currently legal.

Timing also varies by provider within the same state. There is no single regulated duration across all facilities — each provider operates under state health and safety standards but designs their own process within those parameters.

Find a Provider and Start the Conversation

Timing questions are best answered by the provider you are working with — they know their system, their current capacity, and can give you a specific window you can actually plan around. Planning under grief is hard; give yourself permission to ask the practical questions alongside the emotional ones. A good NOR provider will walk you through what to expect at each phase and be available when you need them.

Ready to explore terramation options? Contact TerraCare Partners

Find a funeral home offering terramation in your state

Sources

  1. Washington State Department of Health. “Natural Organic Reduction Rules.” WAC 246-500. https://app.leg.wa.gov/wac/default.aspx?cite=246-500
  2. Washington State Legislature — SB 5001 (2019), the first law legalizing natural organic reduction in the United States, establishing the regulatory framework for NOR facilities. https://app.leg.wa.gov/billsummary?BillNumber=5001&Year=2019
  3. National Funeral Directors Association (NFDA) — 2025 Cremation & Burial Report, national disposition statistics and emerging disposition method trends. https://nfda.org/news/statistics
  4. California Legislature — AB-351 (2022), legalizing natural organic reduction in California effective January 1, 2027. https://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202120220AB351
  5. Colorado General Assembly — SB 21-006 (2021), legalizing natural organic reduction in Colorado. https://leg.colorado.gov/bills/sb21-006