Seedlings start responding to their environment as soon as they leave the nursery. The longer they are held (not planted), the more likely they are to experience stress. This stress can reduce seedling survival and growth after planting. Good transport, handling, storage, and planting straightaway reduces this risk.
Ideally, plant seedlings within a few days of delivery to minimise stress. If that is not possible, many seedlings can be held longer with careful holding practices and regular checks.
How long seedlings can be safely held depends on:
The main thing to remember is to check with your nursery or supplier for guidance about your specific seedlings. They’ll be able to tell you how long you can hold your seedlings for before planting, how much water they need, and if they need to be in chilled storage.
Seedlings can be damaged when you transport them to your site. Careful handling and protection are essential from the moment the seedlings leave the nursery.
While transporting seedlings it’s important to:
Delays are sometimes unavoidable. Weather, site access, and logistics can all push timelines out. If a delay happens, try to reduce seedling stress while you hold the seedlings until you can plant them.
To do this you can:
If you need to hold seedlings, focus on the basics to keep them in good condition.
Good storage usually means shelter, shade, and airflow. Enclosed spaces that trap heat and humidity, or exposed positions in full sun and wind, tend to increase stress during holding.
Some forestry-grade seedlings may be held in chilled storage or in purpose-built storage pods. Avoid storing seedlings below about 4 degrees Celsius unless supplier guidance says otherwise.
Where possible, keep the seedlings off the ground. Doing this can help reduce exposure to pests and improve drainage.
Cold nights, hot dry days, and pests can all cause issues during holding. Think about how you will protect seedlings from temperature extremes and monitor for early pest damage.
How quickly seedlings dry out depends on the weather, container size, and species, so a fixed watering schedule does not always work. It also helps if containers can drain freely.
Some bare root seedlings may be supplied with moisture-retention treatments (for example, hydrogel). Follow the nursery’s instructions and don’t assume this removes the need for cool, moist storage.
A useful check is that the root plug (the soil and roots in the container) feels moist to the touch. It should not be dry or waterlogged.
Some seedlings are grown in sheltered nursery conditions and need a short transition before planting in exposed sites. This transition is called hardening off, it gets the seedlings used to site conditions. Check what level of exposure your seedlings can tolerate on arrival and whether they have already been hardened off.
How long you can hold seedlings outside the nursery depends on the size and type of container they are in.
Smaller containers tend to dry out faster and become constrained sooner. Larger containers can give more buffer time, but they still need regular care and can cost more to transport and plant.
Bare root seedlings need different care from container-grown seedlings. Plant bare root seedlings within a few days of delivery where possible.
If you need to hold them, keep them cool and moist and protect roots from drying out in sun and wind. Keep roots covered in their packaging until planting.
Native species vary significantly in how they respond to planting delays. Some species and root types cope better than others, which affects how long they can be safely held before planting. These differences affect how you plan planting order and manage holding time on site.
Species such as Cordyline australis (cabbage tree, tī kōuka), and Coprosma robusta (karamū) tend to tolerate longer holding periods.
Plants with fleshy or delicate roots are often more sensitive to drying and disturbance than species with woody root systems.
Other species that are slower to develop and more sensitive to disruption include:
Pine and other exotic forestry seedlings can be hardier than some native species. Most forestry companies aim to have exotic seedlings planted as soon as possible (within a week of delivery). They will maintain good practice in storage and handling right up until planting. If planting is delayed, seedlings may need chilled storage depending on seedling type and conditions.
Exotic planting is often done at scale. This means seedling quality can quickly decline if there are delays or if seedlings are exposed to heat, wind, frost, or poor ventilation. Clear roles, planning, and regular checks during storage and staging help prevent avoidable losses.
Some forestry-grade seedlings may arrive as bare root seedlings, boxed for quick planting. Keep them cool and shaded, and avoid leaving the boxes in sun, wind, or frost.
Use this as a guide as different species can look different at the same age.
In general, healthy seedlings have firm stems, and healthy leaves. They should be well rooted for their container size (not falling apart or severely root-bound).
Seedlings may not be ready, or suitable, to plant if they have:
If seedlings show clear signs of disease or severe stress, it may be worth pausing before planting and getting advice on next steps.