Kalanchoe houghtonii is a vigorous succulent of hybrid origin (a cross of two Madagascan Kalanchoe species) popularly called 'Mother of Millions' or 'Mother of Thousands'. It grows upright, narrow, spotted leaves that carry a fringe of tiny plantlets along their margins; each plantlet drops and roots on its own, making the plant almost effortless to multiply.
In Indian homes and balconies it thrives as a low-care pot or windowsill succulent, tolerating heat and neglect well. Mature plants send up tall stems topped with clusters of pinkish to orange tubular flowers, usually in the cooler, drier months.
Note that the very trait that makes it easy to grow also makes it weedy: dropped plantlets colonise nearby pots, so it is best kept contained and not planted in open garden soil.
Specifications
| Family |
Crassulaceae |
| Native region |
Hybrid origin from Madagascan Kalanchoe species |
| Mature height |
Up to 0.6-1 m |
| Mature spread |
20-30 cm |
| Growth rate |
Fast |
| Foliage |
Narrow, fleshy grey-green leaves mottled with purple-brown, bearing plantlets along the margins |
| Flower colour |
Pink to orange-red |
| Flower season |
Winter to early spring (cooler dry months) |
| Climate zone |
Tropical and subtropical; frost-free |
Care guide
| Sunlight |
Bright light; full sun to bright indirect light. A few hours of direct sun keeps it compact and well-coloured. |
| Watering |
Water only when the soil is fully dry; soak and let drain. Reduce sharply in monsoon and winter to avoid rot. |
| Soil / mix |
Sharply draining sandy or cactus mix; add coarse sand, perlite or grit. Never let the pot stay waterlogged. |
| Temperature |
Best at 18-32 C. Tolerates Indian summer heat well but must be protected from frost below 5 C. |
| Humidity |
Prefers dry air; low to moderate humidity. Avoid damp, poorly ventilated spots. |
| Fertilizer |
Light feeder. A dilute balanced or cactus fertilizer once a month in the growing season is plenty. |
| Pruning |
Remove spent flower stalks and leggy growth. Pinch back to keep compact; clear stray plantlets regularly. |
| Repotting |
Repot every 2-3 years or when crowded, into a slightly larger pot with fresh gritty mix; spring is ideal. |
| Propagation |
Extremely easy from the leaf-margin plantlets, which root on contact with soil; also from leaf or stem cuttings. |
| Pests & problems |
Generally tough; watch for mealybugs, aphids and scale. Root rot follows overwatering. |
| Toxicity / safety |
Toxic. All parts contain cardiac glycosides (bufadienolides) and are poisonous if eaten by pets, livestock or children; keep out of reach. |
| Difficulty |
Easy |
Uses
<ul><li>Low-maintenance pot, windowsill and balcony succulent for hot Indian climates.</li><li>Striking accent in succulent and rock-garden arrangements.</li><li>An easy plant for beginners and for teaching propagation, thanks to its self-rooting plantlets.</li></ul>
Growing tips
<p>Keep it in the brightest spot you can; in most of India a sunny balcony or south/west window is ideal, with light shade only in the harshest May-June afternoon sun.</p><p>During the monsoon, move pots under cover and cut watering right down, as the combination of rain and humidity is the main cause of rot. Through winter water sparingly and expect flowering in the cool, dry months.</p><p>Pick off and discard fallen plantlets often so they do not invade neighbouring pots, and keep the plant contained rather than planting it in open ground.</p>
