Can African Onion Plant and Madagascar Lace Plant Grow Together?

African Onion Plant and Madagascar Lace Plant share a workable water window around 20 to 24 °C, pH 6 to 7.5, and 4 to 12 dGH.

Both plants are comfortable in freshwater, so salinity is not a meaningful obstacle.

Flow is workable if the layout gives African Onion Plant moderate flow and Madagascar Lace Plant strong, stream-style flow.

Their light and CO2 needs are close enough for one routine: African Onion Plant does best with moderate light and no added CO2, while Madagascar Lace Plant does best with moderate light and recommended added CO2.

Both plants naturally lean toward the midground and background, which is why spacing, pruning, and final mature size matter more than they do in a more staggered planting mix.

African Onion Plant reaches about 100 cm tall by 30 cm wide, while Madagascar Lace Plant reaches about 60 cm tall by 40 cm wide. Use those mature sizes for the layout, not the small nursery portions you bring home.

Shade is worth watching, but it is usually manageable through trimming and a little spatial separation.

Both are typically bulb / tuber on or partly in substrate with nutrient-rich substrate preferred and feed mainly as root feeders. The method is simple, but it also means the same planting zone can feel crowded if they are placed too close together.

Crowding becomes likely once both plants hit mature size, so this pairing really wants a roomier footprint or a more aggressive trim schedule.

African Onion Plant brings slow growth, low maintenance, and beginner difficulty. Madagascar Lace Plant brings moderate growth, high maintenance, and advanced difficulty. If one grows much faster, trim that plant before it starts making the other look like the problem.

The practical watch-outs are that both plants tend to work in the midground and background, so spacing matters more than usual; and that their mature spread can crowd the same zone quickly unless the layout is oversized from the start; and that the layout needs a little thought so one plant does not slowly dim the other; and that growth pace and maintenance rhythm are uneven, so the stronger grower can dominate if pruning slips.

The strongest reasons to try the mix are that they share a workable temperature window around 20 to 24 °C; and that their flow preferences sit close enough to tune one layout around both plants.

Use this pairing when you are willing to manage the scape, not when you want a plant-and-forget combination. Start with more spacing than you think you need, then adjust once both plants show their real growth pace.

The simple success test is whether both plants still look healthy after the faster grower has been trimmed several times. If one keeps declining after routine care, the layout is probably asking too much of it.

This pairing is best treated as a layout decision, not just a water-parameter match. African Onion Plant and Madagascar Lace Plant can work together, but only when you intentionally manage spacing, shade, and maintenance so the stronger grower does not quietly turn the other into dead weight.