Gadenin日本語Get the appGrow it as a succulent, not as a bedding annual
Livingstone daisy is sold on the same bench as lobelia and alyssum, but it does not behave like them. The leaves are thick, spoon-shaped and full of stored water, and their surface is covered in tiny glistening bladder cells that catch the light like frost. That coating is a desert adaptation: it cuts water loss and reflects heat. A plant built like that does not want the treatment you give a summer bedding plant.
Once you accept that it is a succulent, every care decision falls out of it. Poor sandy or gritty ground rather than improved soil. Full unbroken sun rather than a bright corner. Water only when the plant asks rather than on a routine. No feeding at all. It stays low, about three to four inches (8 to 10 cm) tall, and spreads to eight or twelve inches (20 to 30 cm), so it is a carpet plant for hot ground, not something to place in the middle of a border.
The plant will tell you its water status directly. Leaves that are firm and plump, and that resist a light squeeze, mean there is nothing to do. Leaves that have gone slightly soft and lost their gloss are the signal to water. There is no third state worth acting on, and a plant that has never softened has never needed water from you.
The site does most of the work
Where you put this plant matters more than anything you do to it afterwards. It needs sun on it for most of the day, not just for a few hours, because the flowers themselves are triggered by direct light and stay shut without it. A place that is bright but shaded by a fence or a house by mid afternoon will give you a green mat and very few open flowers, however well you look after it.
It also needs ground that drains fast. Gravel, a wall top, the crumbling edge of a raised bed, a sunny bank, the strip along a hot path, the front rank of a bed that bakes: these are its places. Rich moisture-retentive soil that suits most annuals will make soft, sappy growth, and soft sappy growth on a succulent means stem rot. If your soil is heavy, do not try to improve it with compost. Mix in coarse grit or sharp sand instead, and plant slightly proud so that water runs away from the crown.
In containers use a gritty mix rather than a standard potting mix, roughly two parts compost to one part coarse grit or perlite. Shallow pans work better than deep pots because the roots are shallow and the mix dries out fully between waterings. Every pot must have an open drainage hole and must never stand in a saucer of water.
| Site | How it performs | What to change |
|---|---|---|
| Gravel, wall top or hot bank | Ideal; dense flowering, no rot | Nothing; leave it alone |
| Front edge of a bed in full sun | Very good if the soil is light | Work in coarse grit; plant slightly proud |
| Shallow pan or trough in full sun | Very good, but dries fast in heat | Gritty mix; check weekly in the hottest weeks |
| Bright spot shaded after midday | Healthy leaves, few open flowers | Move it; no care fixes this |
| Improved, moisture-retentive border soil | Lush growth, stem rot, sparse bloom | Lift and replant into grit; stop watering |
| Deep pot standing in a saucer | Rot at the crown within weeks | Remove the saucer; repot into a shallow pan |
Water and feed: the two things that go wrong
Water only when the leaves lose their firmness. In open ground on a light soil that may mean no watering at all after the plants have settled in, apart from a very dry spell of two or three weeks. In a shallow container in high summer it usually works out at once every five to seven days. Water in the morning, soak the mix right through, and then let it dry out completely before you go near it again. Little and often is the worst possible routine for this plant.
Direct the water at the soil, not over the top of the plant. The leaves and stems are soft and juicy, and water sitting in the crown of a low, spreading mat in warm weather is exactly how rot starts. If the plant is in a place you cannot water without wetting it, water early enough in the day that everything dries within a couple of hours.
Do not feed it. Livingstone daisy flowers hardest on poor ground, and nitrogen turns it into leaves. A plant that has been fed makes a big soft green cushion with a handful of flowers on it, and that soft growth is far more likely to collapse in a wet week. If you have already fed it, stop, and simply wait; the plant usually recovers its flowering once the growth hardens up.
If you buy plants in cell trays, they have been grown on a rich peat-based mix with regular feed. Knock most of that mix off the roots when you plant, set them into gritty ground, and expect a fortnight of adjustment before they start flowering properly.
Keeping the display going through the season
Individual flowers last only a day or two, and the plant produces them continuously as long as it is hot and sunny, so there is no point deadheading bloom by bloom. What does help is a tidy-up once the mat starts to look tired, which usually happens when the earliest sowings have been flowering for six or seven weeks and the stems have begun to sprawl with flowers only at the tips.
Shear the whole plant back by about a third on a dry, warm morning. Cut into firm growth, not into old bare stem, and do it when you have at least a full dry day ahead so that every cut seals. Within two to three weeks the plant will have branched and started flowering again. Never do this in a damp cool spell; the cuts stay open and rot follows the shears down the stems.
Pull out any plant that has gone yellow and collapsed at the base rather than trying to save it. In a close mat, one rotting plant will take its neighbors with it. Removing it and leaving the gap open to sun and air is the whole of the treatment.
What to write down for next year
This plant rewards records more than most, because its performance is almost entirely a question of position, and position is easy to forget over a winter. Note the exact spot each patch was grown in, and how many hours of direct sun that spot actually received in midsummer, measured rather than guessed. A quick check at three or four points through the day is enough.
Alongside that, record the date you planted out, the date the first flower opened, and the date the display noticeably thinned. Add a line on how often you ended up watering and whether any plants rotted. Two seasons of that is enough to tell you which parts of your garden are hot and dry enough for it and which are not, which is knowledge no general growing advice can give you.
It is also worth noting the weather in the week either side of any losses. Almost always you will find the collapses cluster in a wet, cool spell rather than in a heatwave, which is the single most useful thing to know about growing this plant.