Gadenin日本語Get the app

How Often to Water a Schefflera Without Rotting the Roots

Water when the top two inches of compost have dried, thoroughly, and then leave it. In winter the interval stretches to two or three weeks.

There is no number of days that works

How fast a schefflera pot dries depends on the pot material, the light, the room temperature and how root bound the plant is, and those factors matter far more than the plant itself. Two identical plants in one house can need water at twice the frequency of each other, so any fixed schedule is wrong for at least one of them.

Find your plant in the table below before you read the seasonal intervals further down, because it tells you which end of each range you should be working at.

Pot and positionHow fast it driesAdjustment
Terracotta at a bright windowFast, surface pales within a dayWork at the short end of every interval
Plastic set back in the roomSlow, dry on top and wet underneathWork at the long end and check deeper
Pot bound, roots at the drainage holesVery fast, water runs straight throughWater more often, and repot in spring
Recently repotted into a larger potVery slow, the outer compost stays wetWater less than you think, wait for real drying
Standing in a cachepot or decorative outer potWater collects unseen in the baseLift it out to water and let it drain
A cool room below 59F (15C)Barely dries at allTwo to three weeks between waterings

A schefflera short of water folds its leaflets downward and recovers within half a day of a thorough soak. If it has not recovered by the next day, the problem is the roots, not the watering.

How to tell whether it is actually dry

The surface of the compost tells you very little, because it dries hours before the middle does. Use two of these checks together and you will not get it wrong.

  1. Put a finger in to the second knuckle Push your index finger about two inches (5 cm) into the compost near the edge of the pot. Dry and loose at your fingertip means water. Cool and clinging means wait, however dry the surface looks.
  2. Learn what the pot weighs Lift the pot just after watering and again a week later. The weight difference is large and unmistakable, and it reads the whole pot rather than one spot. This is the most reliable check on a large plant.
  3. Leave a wooden skewer in the compost Push a skewer two thirds of the way down at the edge of the pot and pull it out to look. Dark and damp means wait. Dry and clean means water. It is the only easy way to read the bottom of a deep pot.
  4. Do not rely on a moisture meter alone A meter reads one point at one depth in a pot that dries unevenly, and cheap ones read the salt content as much as the water. Use it alongside your finger and the pot weight, not instead of them.

Water thoroughly, then stop

The right technique is the opposite of what most people do. Small frequent splashes wet only the top inch, so the roots in the bottom two thirds of the pot never drink and eventually die back, while the surface stays permanently damp and grows fungus gnats.

Instead, water until it runs freely from the drainage holes, wait a few minutes and water again if it soaked in immediately, then empty the saucer and do not touch it until the top two inches (5 cm) have dried out.

  1. Water until it runs out of the base A full watering wets the entire root ball and flushes accumulated fertilizer salts out of the compost. Anything less is a partial watering that trains the roots into the top of the pot.
  2. Empty the saucer within half an hour Water left standing keeps the base of the compost permanently saturated, which is exactly where root rot starts. This matters most in winter, when the plant is drinking least.
  3. Take it out of any decorative outer pot Watering a plant while it sits in a cachepot means the excess collects invisibly in the bottom. Lift the inner pot out, water it, let it drain for ten minutes, then put it back.
  4. Rehydrate a bone dry pot properly If compost has dried so hard that water runs down the gap at the edge, stand the pot in a bucket of water for twenty minutes until the surface is damp, then lift it out and let it drain. One pass with a watering can does nothing.
  5. Use water at room temperature Cold water straight from the tap chills the roots and checks growth, particularly in winter. Fill the can and leave it standing overnight.

Seasonal intervals as a starting point

These figures are for a plant in a pot around eight inches (20 cm) across in a reasonably bright position. Treat them as the shape of the year rather than as instructions, and adjust from what the compost is doing.

SeasonRoom temperatureIntervalNotes
Spring59 to 72F (15 to 22C)Every 5 to 7 daysIncrease as new growth appears
SummerAbove 77F (25C)Every 4 to 7 daysWater in the morning or evening, not at midday
Autumn59 to 68F (15 to 20C)Every 7 to 14 daysStretch the interval as the light falls
Winter, heated room64 to 72F (18 to 22C)Every 10 to 14 daysWarm but dark, so it drinks less than it looks
Winter, cool room50 to 59F (10 to 15C)Every 2 to 3 weeksWater on a mild morning only

Reduce the frequency in winter, not the amount. Half a can every week keeps the top wet and the bottom dry, which is the worst of both. A full watering every third week is correct.

Reading the symptoms

Overwatering and underwatering produce symptoms that look alike, which is why so many struggling plants get watered more and die faster. The compost tells you which way to read the leaves, so check it before you decide anything.

SymptomIf the compost is wetIf the compost is dry
Leaflets drooping and folding downRoot rot. Stop watering and let it dry hardThirsty. Soak it thoroughly and repeat in a few days
Lower leaves turning yellow and droppingOverwatered. Check the roots, repot if softUnderwatered, or simply too dark. One or two is normal
Brown crisp leaf tipsRoots damaged, or fertilizer salts built upDry air. Move away from heaters and mist
Black spots spreading on leavesWet compost plus cold. Dry it out and warm itRare when dry. Look for sun scorch instead
Small flies around the potFungus gnats in permanently damp surface compostNot the problem when the surface is dry
No new growth at all in the growing seasonRoots suffocating in dense wet compostChronically dry, or short of light and feed

When you cannot tell, slide the plant out of the pot and look. Firm pale roots mean it is a watering routine problem. Brown, soft roots that smell sour mean rot, and the answer is fresh dry compost, not more water.

What to write down

Watering is the one job where a short record changes your results, because the whole skill is learning your own pot in your own room and that is exactly what memory is bad at.

Note the date every time you water, and next to it a single word for what the compost was like when you checked: dry, damp or wet. Do it for one season and the interval that actually suits your plant emerges from the page without any calculation. Add the date you moved the plant, changed its pot, or turned the heating on, because each of those resets the interval and the record shows you by how much.

Two other notes pay for themselves. Write down the date you last flushed the pot thoroughly, because a plant watered lightly for months accumulates fertilizer salts and wants a good flush at least twice a year. And write down the date of the first drooping leaf of a hot spell, because that date is remarkably consistent year to year and it tells you when to start checking daily rather than weekly.

Read next

Log watering, feeding and treatments

Note each watering, feed, and spray in a couple of taps. Gadenin shows days since planting and your last feed, so you stop guessing when the next one is due.

Free on iPhone. Android coming later.

Gadenin free garden journalGet the app