Repotting guide
When & how to repot Calendula (Calendula officinalis)
Also called pot marigold, common marigold, English marigold, Scotch marigold, garden marigold.
More about calendula
About Calendula
Calendula officinalis · also called pot marigold, common marigold · flowering
Calendula (pot marigold) is a fast-growing cool-season annual prized for vivid orange and yellow daisy-like blooms that flower from late spring until the first hard frost. Easy from seed, it thrives in full sun and free-draining soil, and its edible petals are a kitchen favourite. Pet-safe — the ASPCA lists it as non-toxic to cats and dogs.
Mature size: 30-60 cm tall and wide
How to tell calendula needs repotting
Repotting on a calendar is less reliable than reading the plant. For calendula, watch for these signs:
- Roots circling the bottom of the module or pot, or poking out of the drainage holes.
- The seedling dries out within a day and growth has visibly stalled.
- Roots are white and matted in a tight spiral when you tip the plant out.
- It has outgrown its current container for the stage of the season — pot calendula on before it becomes hard root-bound.
For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.
How often to repot calendula
Pot on seedlings as they grow; not a perennial repot. Calendulais grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Fast-growing bushy annual.
What size pot to step calendula up to
Pot calendula on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check.
Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.
The best time of year to repot calendula
Pot calendula on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.
Step-by-step: repotting calendula
- Pot on before it is root-bound. Check calendula regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
- Step up one or two sizes. Choose the next container up — not a giant one. Cold, wet, unused soil around a small root system stalls seedlings.
- Knock it out gently. Support the stem, tip the pot, and ease the rootball out without breaking it. A little teasing of circled roots at the base is fine.
- Pot into rich mix. Set it into fresh average, free-draining garden soil at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
- Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.
Aftercare
Water calendula in well and keep it in bright light; a freshly potted-on seedling can wilt for a day while roots settle, so do not overcompensate by drowning it. Do not fertilise for about 1 week — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.
The right soil mix for calendula
Calendula wants average, free-draining garden soil. Tolerates poor, light soils across pH 5.5-7.0. Avoid wet or overly rich soils, which produce soft, floppy growth and fewer flowers. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.
Repotting calendula — frequently asked questions
How often should you repot calendula?
Pot on seedlings as they grow; not a perennial repot for calendula. Calendula is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into average, free-draining garden soil so the roots never circle the cell, ending in a large final container. A root-bound transplant stalls and never fully recovers.
What size pot does calendula need?
Pot calendula on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check. Use our pot size calculator to size it from the plant's current pot and root spread.
When is the best time of year to repot calendula?
Pot calendula on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.
Can you put calendula straight into a much bigger pot?
No. Even a fast-growing calendula should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.
Should you fertilise calendula after repotting?
Not immediately. Wait about 1 week after repotting calendula. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.
Related guides
- Calendula care — light, water, soil and common problems
- How often to water calendula — the watering brief
- How to repot a plant — the complete step-by-step method
- Root-bound plant — how to spot and fix it
- Pot size calculator — size the next pot correctly
- When & how to repot peace lily
- When & how to repot bird of paradise
- When & how to repot hoya
- All 271 repotting guides in the Growli library