Remove about one-third or more of the old potting mix surrounding the plant's roots. As it grew, your plant removed some or all of the nutrients in the current mix, so you'll want to give it fresh potting mix or soil. Pour a layer of fresh potting soil into the empty planter and pack it down, removing any air pockets.
Do You Keep Old Soil When Repotting? Removing the soil from the roots depends on a number of factors. It's important to understand that discarding old healthy soil can cause damage to your plant's roots, while leaving moldy soil can cause your plants health to deteriorate.
As long as used potting soil still looks fairly fluffy and doesn't emit a rotten odor, gardeners should be able to use it again with good results. However, if the plants formerly grown in the potting soil struggled with disease or insect problems, it's probably best to discard the mix and start fresh next season.
You can either go for the bath method and bottom water, or thoroughly top water. I prefer to give plants a bath (bottom water) as step one, a day or two before I repot, then I like to thoroughly top water drench after repotting, as top watering also helps flush out excess dirt and silt from the new substrate.
If the plant itself makes up more than ⅔ of the height, it's time to repot. Not all plants grow taller; some grow fuller or longer (think trailing varieties). The same rule applies, though: Consider repotting whenever the plant seems to outgrow its home, Greene says.
Top it off: If the level of soil has dropped, add fresh planting mix also known as potting mix. Ideally, the soil comes to within an inch or so of the rim of the planter or raised bed. Use a fork or hand tool to blend the new soil into the old soil. Blend new soil into the old soil.
Make sure the plant is well watered 2-4 days in advance. You don't want to repot when it's sopping wet but being too dry will cause stress. Take the plant out of the pot. If the rootball is a bit tight, gently massage the roots to loosen them up.
Typically, changing the soil in your potted plants should happen every 12 to 18 months. There are some exceptions that may change this timing. These include if you're moving a plant into a bigger pot because it's outgrown its current pot or if the soil has become very hard.
If plants died from bacterial, fungal or viral disease, then you definitely do not want to reuse the soil, as soilborne pathogens can still be present and active. However, if the plants that grew in the soil before were healthy, it is generally OK to reuse the potting soil.
If your plant succumbs to root rot, you can reuse the soil in a new plant, however, you'll have to take a few important steps first, such as sanitizing it (which we describe below).
Allow for Good Soil Drainage
For container plants, potting soil should be used and pots must have drainage holes. Any saucers below houseplants should be emptied regularly and plants need to be potted in appropriately sized, not oversized, containers to avoid an excess of moisture in the soil.
Roots packed tightly in a pot don't take up nutrients efficiently. To promote good nutrient absorption, trim the roots and loosen up the root ball before replanting. Use a sharp knife or pruning shears for this job, removing as much as the bottom third of the root ball if necessary.
There could be several reasons for a plant dying after replanting, including: shock from transplantation, incorrect planting depth, not enough water or too much water, pest or disease problems, or improper lighting conditions.
A plant which is newly dug up and shifted to another place may show signs of wilting leaves, dying branches or it might die altogether. It is called transplant shock. The transplant shock is caused by harm to the plant roots during the transplanting process.
For larger plants or trees, it can take months or even years for all problems caused by transplant shock to resolve. A simple case of wilting after repotting can be resolved with good care and often the plant has no residual signs of damage. A more severe case can result in dead or damaged foliage.
“If your potting soil has passed the two-year mark, you can still make use out of it by amending it or adding it to raised beds for support or sprinkling it on flower beds,” says Sears.
Spread a minimum of 2 to 3 inches of compost or aged manure onto your soil (and no more than four inches). If it's your first garden and you have poor soil, we would recommend working in the compost. If your garden is established, we recommend a no-dig approach and just leaving the compost on the surface.
Always make sure soil is wet when transplanting. Don't think you can plant in a dry hole and quickly water the plant.
However, repotting can be a somewhat traumatic experience for plants, and some are more sensitive to this disruption than others. The journey from the garden center to your home is quite an adjustment for your plants, and they should be given a little time to rest before repotting.
The best time to repot a plant is in the spring so that actively growing roots will have enough time to grow into newly added potting mix. There are several signs that houseplants can exhibit when they are pot-bound. First check the frequency you are watering the houseplant.
In general, the best time to repot your houseplant is during the spring and summer when the plant is in active growth. Fall is also a good time for transplanting, but try to do it at least three to four weeks before you bring the plant indoors for the winter.
Stop Watering the Plant
But stopping your watering is always the first step. If you're overwatering, you'll likely notice that the soil is wet, so you want to make sure that soil is bone dry before you're ready to break out the watering can again.