There is a moment in most plant journeys where the starter ten — Monstera, snake plant, pothos, peace lily, ZZ, rubber plant, spider plant, succulents, philodendrons, Chinese money plant — begin to feel solved. The reader knows how to read them, when to water, how to recover one after a wobble. What they don’t yet have is the next step: the plants that are a little harder, a little fussier, but that reward attention in a way the easy ones don’t.
This page is that next step. Five plants that aren’t beginner-level but aren’t expert-level either — they are the territory where your judgment starts mattering. Each one asks for one specific bit of attention: soft water, a respected dormancy, careful watering, real direct light, a humidifier in winter. Master those five demands and you have most of what you need to go on to the genuinely difficult tier afterwards.
Why “intermediate” is a real category
The gap between an “any room, any care” beginner plant and a genuinely demanding species like a Calathea White Fusion or an Anthurium crystallinum is large. Bridging that gap with a single jump usually goes badly — the reader gets a demanding plant, kills it within a season, and concludes they are not a plant person. They are a plant person; they were just missing the middle layer.
Intermediate plants ask you to stop following a schedule and start adapting. They will tell you when they are unhappy, but only if you have learned to read them. A Calathea browns at the edges from hard water before it shows any other symptom. An Alocasia drops a leaf in autumn weeks before its full dormancy begins. A Strelitzia stops growing entirely if it does not get enough light, and the change is invisible from one week to the next. These are diagnostic skills as much as care skills, and the only way to build them is on plants that demand them.
1. Maranta (Prayer Plant)
The prayer plant earns its name through one of the most charismatic behaviours in indoor horticulture — its leaves fold upwards every evening, as if in prayer, and unfold again in the morning. The movement is real, slow enough to watch if you sit with it for a few minutes, and it is also the best daily diagnostic any houseplant can give you. A Maranta that has stopped praying is unhappy. A Maranta that prays vigorously is fine.
What makes it tricky. Maranta is highly sensitive to hard water — and almost all UK tap water is hard. Calcium and magnesium build up at the leaf margins and cause brown crispy edges that, once damaged, do not heal. The fix is straightforward but unforgiving: water with rainwater, filtered water, or boiled-and-cooled tap water for the rest of the plant’s life. The other tricky variable is humidity: Maranta wants 60% or higher year-round, and UK winters indoors are usually nearer 25–30% once heating goes on. See the British Houseplant Year hub for the seasonal humidity collapse and what to do about it.
What makes it rewarding. Few other houseplants have anything like the prayer movement. The leaves themselves come in striking patterns — herringbone reds, dotted greens, blacks and silvers — and a healthy Maranta is one of the more beautiful plants you can own. Pair it with a bathroom location, a small humidifier, and soft water, and it will reward you for years.
2. Alocasia
Alocasia is the plant that teaches you what dormancy actually means. Many people kill their first Alocasia by trying to save it from a process that was always going to happen: it drops most or all of its leaves in autumn, the stem may die back partially, and to an inexperienced eye it looks like the plant has failed. It has not. Underground, the corm is still very much alive, and in March it will send up a fresh leaf without ceremony, as if nothing had happened.
What makes it tricky. The instinct during dormancy is the worst possible move: water it more, repot it, fertilise it, move it to better light. All of these stress a dormant plant further and frequently kill it. The correct response to an Alocasia dropping leaves in October is to reduce watering to almost nothing, stop feeding entirely, leave the pot somewhere bright but cool, and wait until spring. The plant is not in crisis. It is doing what it does.
What makes it rewarding. The architectural foliage is genuinely dramatic — Alocasia ‘Polly’ (the African Mask), the giant ‘Macrorrhiza’, the dark-veined ‘Reginula’ — and the spring re-emergence from what looked like a dead pot is one of the more satisfying moments a houseplant offers. Once you have understood the dormancy cycle and stopped fighting it, Alocasia becomes one of the most rewarding genera in the hobby.
3. Ceropegia (String of Hearts)
Ceropegia woodii is half succulent, half vine — its small heart-shaped leaves are thick and water-storing, its stems are thin and trail metres if given the chance, and its watering rhythm is closer to a Crassula than to any of the tropical aroids most people are coming from. It is the plant that teaches you to throw away the watering can for half the year.
What makes it tricky. A Ceropegia that is treated like a Monstera will be dead inside six months. Its tubers are extremely susceptible to rot, and the symptoms of overwatering — soft, translucent leaves; stems collapsing where they meet the soil — appear without warning. The fix is to let the soil dry completely before watering, then water thoroughly and let it dry again. In winter this can stretch to once a month or longer. Use a gritty cactus-and-succulent mix, never a peat-heavy aroid mix. The watering guide covers the dry-completely-between-waterings principle in detail.
What makes it rewarding. It is the easiest plant in the world to propagate. Every node along a trailing stem will root if it touches damp soil or floats on water, which means a single string of hearts becomes ten plants within a year if you want it to. For most plant keepers this is the first propagation experience that genuinely succeeds without effort, which makes it a confidence-builder out of proportion to its visual impact.
4. Strelitzia (Bird of Paradise)
Strelitzia nicolai (the giant white bird of paradise) and Strelitzia reginae (the orange-flowered classic) are the two species you will find sold as indoor plants in UK shops. Both are dramatic — large, structural, with paddle-shaped leaves that split with age into the classic banana-leaf silhouette — and both are also genuinely demanding of light in a way most “indoor” plants are not.
What makes it tricky. Strelitzia wants more direct sunlight than nearly any other species sold as a houseplant. A south-facing window with no nearby obstruction is roughly the minimum; an east or west window will keep one alive but rarely thriving. UK light averages, combined with British conservatory or living-room positions, mean most Strelitzia indoors are slowly running below their light needs without ever showing dramatic symptoms — they just stop growing. Flowering indoors in the UK is extremely rare for the same reason. Check your light with the Light Calculator before you buy one; if the answer is “medium indirect”, do not buy a Strelitzia.
The leaf splits often alarm new owners. They should not. The splits are normal and intentional — they let wind pass through the large leaves without tearing them, and a Strelitzia with no splits is usually one that is too young or too sheltered, not one that is unhealthy.
What makes it rewarding. Scale. A well-positioned Strelitzia is a piece of sculpture in a way few other indoor plants achieve — full-grown specimens reach two metres or more and become a structural element of the room.
5. Stromanthe Triostar
A note on the substitution: we have put Stromanthe Triostar in this slot rather than Pilea peperomioides, which was once a hard-to-find collector’s plant but has been mainstream in UK garden centres since around 2023. Pilea is now a starter plant in everything but reputation, and a hub about “trickier houseplants” should reflect that. Stromanthe Triostar is the better representative of the intermediate tier — it shares the Marantaceae-family demands of Maranta and Calathea (soft water, high humidity) with the added challenge that its pink-cream-green variegated tissue contains less chlorophyll than its all-green relatives, which makes it weaker overall.
What makes it tricky. Stromanthe Triostar wants every variable correct at once. Hard water browns the edges. Low humidity browns them further. Direct sun fades the variegation. Low light slows the new growth so much that the plant can lose more leaves than it gains. The cumulative effect is that intermediate plant keepers often kill their first Triostar from a combination of small lapses none of which would have killed a Maranta or a Calathea individually.
What makes it rewarding. The leaf colouring is unlike any other houseplant — vivid pink streaks across cream and green, with the underside of each leaf a deep magenta that flashes when the leaves move at night. (Stromanthe also has the prayer movement, though less dramatically than Maranta.) A healthy Stromanthe Triostar is one of the most striking variegated houseplants you can keep. Pair it with a bathroom or kitchen position, soft water, and bright indirect light, and it will thrive.
What links these five
Each of these five plants has one specific demand that less-attentive care will not satisfy:
- Maranta: soft water
- Alocasia: respected dormancy
- Ceropegia: dry-completely-between-waterings watering rhythm
- Strelitzia: real direct light
- Stromanthe Triostar: consistent humidity plus soft water
Once you have kept each, your toolkit has expanded by one variable each. That is what graduates you toward the genuinely difficult tier — calatheas with white tissue, Anthurium velvet-leaf species, Begonia masoniana, ferns more demanding than Boston. Each of those plants asks the same kinds of questions, but with less tolerance for half-right answers.
The houseplant science hub covers the underlying mechanisms — photosynthesis, transpiration, root respiration — that make each of these specific demands matter. Once those connect, the leap to harder plants becomes more like a refinement than a jump.
Where to start
Pick the plant that fits the room and the gap in your current toolkit:
South-facing window with no obstruction and space for scale? Strelitzia. The plant most likely to transform a room visually.
North or east window with a bathroom or kitchen nearby that holds humidity? Maranta or Stromanthe Triostar. Both want what those rooms naturally provide. Maranta is more forgiving; Triostar more striking.
Want a propagation win you can give away? Ceropegia. By Christmas you will have eight more plants from one.
Ready for the dormancy lesson and bored of plants that look the same year-round? Alocasia. The autumn die-back and spring re-emergence are the most dramatic seasonal cycle any houseplant offers.
If you already have one of these five and want to know what to add next, work through the Plant Doctor hub on whichever of yours is closest to fully solved — once you can diagnose it cold, you are ready for the next one on this list. Intermediate plant keeping is mostly that: keeping one plant until reading it is automatic, then bringing in the next one whose specific demand you have not learned yet. After five or six of those rounds, the territory that looked impossible at the start is the territory you now live in.
More guides on similar topics
Other Myrtle guides you might enjoy
Also in Mist
Explore Mist rituals & spiritual guides →