Spring through summer is the best time for pothos cuttings. Take a cutting in warm summer light and you will notice it pushes roots much faster than one you start in a cool, dim winter room. The plant is awake and growing in those warmer months, so it puts real energy into new roots. Watch two cuttings side by side and the gap is hard to miss. The warm-window one beats the dim-room one by a wide margin. That head start is the whole reason timing matters here.
The reason comes down to warmth and light. Roots form when the plant builds new cells at the cut stem. That cell growth needs heat and longer days to fire up. Wisconsin's extension says buds break fastest in warm temperatures. The same idea drives root growth on a cutting. Cold, short days slow everything down. A winter cutting just sits there while a summer one races ahead. This is also why the best time to propagate pothos lines up with the warmest stretch of the year. Heat and light are the engine, and both run strongest in the warm months.
Penn State's extension is direct about it. Propagation through stem cuttings is more successful during the growing season, from spring through summer. That matches what you see on a windowsill. A cutting taken in June often shows white root nubs in a week or two, while the same cutting in December can take a month or more to do the same thing.
Spring
The ideal window opens as light and warmth increase, driving fast, reliable rooting.
Summer
Peak growing season, with the quickest rooting and strongest new growth on cuttings.
Fall
Still workable indoors, though rooting slows as days shorten and rooms cool.
Winter
Slowest season; provide warmth and bright indirect light if you propagate now.
A lot of people worry that fall is too late, but that worry is mostly off the mark. Pothos cuttings still root indoors well past summer. They just take their time. Your house stays warmer than a garden bed. That steady indoor heat keeps a late cutting alive. It keeps slowly building roots even when the weather outside has turned cold. You give up speed, not the cutting itself. A fall or winter cutting that takes a month to root is still a new plant in the end. So do not throw out a good trimming just because the season has changed.
If you do propagate off-season, give the cutting two things and it will root fine. Keep it warm, around 60 to 80°F (16 to 27°C), since that range is where the stem builds new cells well. A cold windowsill at night can stall it, so pull the jar back to a warmer spot once the sun drops. Then set it in bright indirect light, not a dark corner and not harsh direct sun. A spot near an east window or a few feet back from a bright south window works. If your home is short on winter light, a basic grow light a foot above the cutting fills the gap. With that warmth and light, a late cutting is low risk even if it lags behind a summer one.
So aim for the spring and summer growing season when you can, because that is when cuttings root fastest and strongest. Plan your main batch for those warm months and you will get the quickest results with the least fuss. But do not skip a healthy vine just because the calendar says fall or winter. Snip it, give it warmth and bright light, and it will still root for you on a slower clock.
Read the full article: Pothos Propagation: A Complete Guide
