Apologies for the lazy answer but this is a great example or one of the positives in A.I. Here's what Grok had to say when I literally cut/paste your entire post:
1. Is it really four plants?
Yes — miniature/patio roses are often grown with 3–4 buds grafted onto a single rootstock. So what looks like “four plants” is actually one plant with multiple stems. They can look uneven at first (different growth rates, slight differences in sun exposure, or one stem got more stressed). Totally normal. Just treat it as one unit.
2. Location: Afternoon sun + radiator =
Afternoon sun: Good! Roses love 5–6+ hours of direct light.
Near a radiator: Bad. Dry heat + warm air = rapid soil drying + stress.
Fix:
Move it at least 1–2 feet away from the radiator when it’s on. If you can’t, put a saucer of water nearby (not under the pot) to raise humidity, or group it with other plants.
3. Watering: How often + tap water?
Tap water is fine (UK water is generally soft-ish and safe for roses). Let it sit 24h if you're paranoid about chlorine, but not essential.
How often? → When the top 2–3 cm of soil feels dry.
Stick your finger in — if it’s dry past your first knuckle, water. If damp, wait.
Pro tip: Lift the pot.
Light = dry → water
Heavy = still wet → wait
In winter (heating on): Every 3–5 days is common indoors.
** But check daily** — you’re already doing great!
How to water:
Water thoroughly until it runs out the bottom.
Empty the saucer after 30 mins — no soggy roots.
4. Uneven hydration between stems?
Could be:
One side gets more sun/heat → dries faster.
Root system uneven → some stems pull more water.
Minor transplant shock.
Fix:
Rotate the pot ¼ turn every few days → even growth.
Trim any dead or yellow leaves at the base (clean scissors).
If one stem looks really sad (black stems, shrivelled), cut it back to healthy wood.
5. Winter care (indoors, UK)
Keep at 10–18°C if possible (cooler = better dormancy).
No feed until spring (March/April).
Mist leaves occasionally if air is super dry (radiator season).
6. Spring bonus
When frost risk is gone (April/May), put it outside in a sunny spot. It’ll explode with growth and flowers. Bring in before first frost or treat as annual.
How true any of that is, dunno...