Watering schedule
How often to water Lobster Flower (Plectranthus neochilus) — the schedule
Also called Lobster Flower, Blue Coleus, Spur Flower.
More about lobster flower
About Lobster Flower
Plectranthus neochilus · also called Lobster Flower, Blue Coleus · flowering
Plectranthus neochilus is a low-growing, mat-forming, semi-succulent perennial native to southern Africa, instantly recognisable by its lime-green, broad leaves with coppery-purple undersides and its strong, pungent aroma that is widely used as a natural cat and dog deterrent in gardens. It produces upright spikes of soft purple-blue tubular flowers through much of the growing season. The most important care fact is that it is remarkably drought tolerant due to its succulent stems, and overwatering is the primary cause of failure — water only when the soil is fully dry. Multiple sources classify the genus pattern as non-toxic to dogs and cats, and Mountain Crest Gardens specifically lists P. neochilus as pet-safe.
Ideal humidity: Low to moderate (30–50%)
Watch for — Root and stem rot from overwatering: Soft, blackened stem bases and wilting despite moist soil indicate rot; cut away affected tissue, allow remaining roots to dry for 24 hours, and repot in fresh dry gritty mix.
The watering schedule, season by season
Lobster Flower stores water in its thick leaves and stems, so when in doubt, wait — it survives drought far better than soggy soil. The base rhythm for lobster flower is every 2–3 weeks in summer; monthly or less in winter, but the real interval moves with the season, the light and the pot — so treat the figures below as a starting point and always confirm with the plant itself.
- Spring & summer (active growth): Spring and summer: soak fully, then leave it alone until the soil is dry all the way down — usually around every 2–3 weeks.
- Autumn (slowing down): Autumn: ease off as growth slows; stretch the gap noticeably longer than the summer rhythm.
- Winter (rest / dormancy): Winter: water sparingly, roughly once a month or even less in a cool room. The thick leaves carry it through.
Allow the soil to dry out completely between waterings; the succulent stems store moisture effectively and will rot if kept consistently wet, especially in cool weather.
Want this turned into a live reminder that adjusts to your home and the weather? The Growli watering calculator takes your pot size, light and season and returns a starting interval for lobster flower in seconds.
How to tell lobster flower needs water
A calendar is the worst way to water lobster flower. Check the plant and the soil instead — for this species, look for these signals in order:
- The lower or oldest leaves feel slightly soft or look a touch wrinkled.
- The pot is noticeably light when lifted.
- Soil is dry several centimetres down, not just at the surface.
The most reliable single check is the first one on that list. When two signals agree, water; when they disagree, wait a day and look again — under-watering lobster flower for a day is almost always safer than over-watering it.
Overwatering vs underwatering lobster flower
The two failure modes can look alike at a glance, so check the soil weight and wetness before you decide. For lobster flower specifically:
Signs you are overwatering
- Leaves turn translucent, yellow, soft and mushy — classic overwatering.
- Lower stem darkens or goes squishy at soil level.
- Whole rosettes or sections drop at the lightest touch.
Signs you are underwatering
- Leaves pucker, wrinkle or curl inward — a harmless thirst signal that reverses fast after a soak.
- Older leaves dry crisp from the tips first.
Overwatering is the number-one killer of lobster flower. The thick leaves are a water tank — a slightly thirsty plant recovers in a day; a waterlogged one rots from the roots up.
Water quality notes
Tap water is generally fine for lobster flower; the soak-and-dry rhythm matters far more than water type.
Seasonal and environmental adjusters
Every figure above shifts with the conditions in your home. For lobster flower, the levers that matter most are:
- A gritty, free-draining mix is essential — ordinary potting soil holds too much water for this plant.
- Terracotta dries faster and is more forgiving than plastic or glazed ceramic.
- More light and warmth speed drying, so the interval shortens in peak summer — always check, never assume.
Pot choice is part of this too — work out the right size with the pot size calculator, since a pot that is too big stays wet long enough to rot the roots of lobster flower.
Lobster Flower watering — frequently asked questions
How often should I water lobster flower?
Water lobster flower every 2–3 weeks in summer; monthly or less in winter. Spring and summer: soak fully, then leave it alone until the soil is dry all the way down — usually around every 2–3 weeks. Winter: water sparingly, roughly once a month or even less in a cool room. The thick leaves carry it through.
How do I know when lobster flower needs water?
The lower or oldest leaves feel slightly soft or look a touch wrinkled. The pot is noticeably light when lifted. Soil is dry several centimetres down, not just at the surface. The single most reliable test for lobster flower is the first signal on that list — checking the soil or the plant directly always beats watering by the calendar.
What does an overwatered lobster flower look like?
Leaves turn translucent, yellow, soft and mushy — classic overwatering. Lower stem darkens or goes squishy at soil level. Whole rosettes or sections drop at the lightest touch. Overwatering is the number-one killer of lobster flower. The thick leaves are a water tank — a slightly thirsty plant recovers in a day; a waterlogged one rots from the roots up.
What are the signs of an underwatered lobster flower?
Leaves pucker, wrinkle or curl inward — a harmless thirst signal that reverses fast after a soak. Older leaves dry crisp from the tips first.
Can I use tap water on lobster flower?
Tap water is generally fine for lobster flower; the soak-and-dry rhythm matters far more than water type.
Keep reading
- Watering lobster flower in the UK — hard vs soft tap water
- Lobster Flower care — the full brief (light, soil, humidity, problems, pet safety)
- Watering calculator — get a starting interval for your exact pot and light
- Pot size calculator — the right pot keeps watering forgiving
- How often to water succulents — the soak-and-dry method
- Overwatered plant — signs and how to recover it
- Why is my succulent dying? The overwatering autopsy
- How often to water sapphire blue oat grass
- How often to water bronze sedge
- How often to water amazon mist sedge
- All 10153 watering schedules in the Growli library