Repotting guide

When & how to repot Aglaonema 'First Diamond' (Aglaonema commutatum 'First Diamond')

Also called First Diamond Chinese Evergreen.

More about aglaonema 'first diamond'

About Aglaonema 'First Diamond'

Aglaonema commutatum 'First Diamond' · also called First Diamond Chinese Evergreen · houseplant

Aglaonema 'First Diamond' is a compact Chinese Evergreen with near-white, silvery leaves edged and flecked in green. It thrives in low-to-medium light, tolerates neglect, and is among the easiest variegated aroids. The pale foliage burns in direct sun, so keep it shaded. Warm, draught-free rooms with steady moisture keep its bright colouring crisp.

Mature size: Around 40-60 cm tall and wide indoors over several years.

Watch for — Brown leaf tips: Usually from dry air, fluoride or salt build-up in tap water. Raise humidity and flush the pot occasionally.

How to tell aglaonema 'first diamond' needs repotting

Repotting on a calendar is less reliable than reading the plant. For aglaonema 'first diamond', watch for these signs:

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for aglaonema 'first diamond') flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 aglaonema 'first diamond'

Only every 2–4 years, when genuinely crowded. Aglaonema 'First Diamond' is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Slow-growing, clumping evergreen perennial with upright stems that form a dense, bushy mound of broad lance-shaped leaves..

What size pot to step aglaonema 'first diamond' up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Aglaonema 'First Diamond' positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping aglaonema 'first diamond' into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 aglaonema 'first diamond'

Early spring, just as new growth restarts, is the ideal window for aglaonema 'first diamond'. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting aglaonema 'first diamond'

Confirm it actually needs it. Slide aglaonema 'first diamond' out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip aglaonema 'first diamond' out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh loose, well-draining aroid or peat-based potting mix, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water aglaonema 'first diamond' again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for aglaonema 'first diamond'

Aglaonema 'First Diamond' wants loose, well-draining aroid or peat-based potting mix. Use a free-draining mix of peat or coir, perlite and a little bark or compost. Aim for pH 5.6-6.5. Always pot into a container with drainage holes to prevent waterlogging. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting aglaonema 'first diamond' — frequently asked questions

How often should you repot aglaonema 'first diamond'?

Only every 2–4 years, when genuinely crowded for aglaonema 'first diamond'. Only repot aglaonema 'first diamond' every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using loose, well-draining aroid or peat-based potting mix. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does aglaonema 'first diamond' need?

When is the best time of year to repot aglaonema 'first diamond'?

Does aglaonema 'first diamond' like to be root-bound?

Yes — aglaonema 'first diamond' genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise aglaonema 'first diamond' after repotting?

Not immediately. Wait about 4 weeks after repotting aglaonema 'first diamond'. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.