Gadenin日本語Get the appCut the old leaves off before the flowers open
There is one job in the hellebore year that matters more than everything else put together, and it takes about two minutes per plant. In late winter, while the flower buds are still low in the crown and before the stems begin to lengthen, cut every one of last year's leaves off at ground level. Do not tidy some of them. Take the lot.
The first reason is that it transforms how the plant looks. Hellebore flowers are carried at or just above the height of the old foliage, so a clump left uncut flowers down inside a mound of leathery, weather-beaten leaves and you barely see it. Strip the leaves away and the flower stems rise out of bare ground with nothing competing with them. The same plant goes from disappointing to the best thing in the winter garden without any other change.
The second reason matters more in the long run. Hellebore leaf spot overwinters in those old leaves, and every dark blotch on them is a source of spores that will rain down onto the new growth and onto the flowers. Cutting the leaves off and getting them out of the garden removes most of the inoculum before the new season starts. It is the single most effective disease control available for this plant, it costs nothing, and no spray comes close to it.
- Go in late winter, before the stems lengthen The window is once the flower buds are visible at the base of the clump but before they have pushed up. Working then means you can see what you are cutting and there is nothing to catch a blade on.
- Cut every old leaf at ground level Follow each leaf stalk down to where it leaves the crown and cut there, leaving no stub. Use pruners or scissors rather than pulling, because tugging a stalk can lift the whole crown out of the soil.
- Leave the flower buds and any new leaves alone Flower buds are fat and rounded, old leaf stalks are thin and hard. If new leaves have already started, they are pale and soft and should be kept. Everything leathery and dark goes.
- Do not compost the leaves Bin or burn them. Leaf spot survives happily in a garden compost pile and comes straight back to the plant with next year's mulch, which undoes the whole exercise.
- Treat the shrubby kinds differently Where leaves and flowers share one upright stem, do not strip the leaves. Instead cut out whole stems only after they have flowered, and leave the non-flowering stems intact.
- Wear gloves and clean the blades The sap irritates skin. Wipe the pruners with disinfectant before moving to the next clump, so you are not carrying leaf spot from a diseased plant to a clean one.
Feed once, mulch once, and keep the fork out of the bed
Hellebores are hungry for a woodland plant and respond visibly to being fed, but the timing is narrow. The feed that counts goes on straight after flowering, when new leaves are expanding and the crown for next winter is being built. A balanced slow-release fertilizer or a couple of handfuls of well-rotted manure per clump, scattered on the surface and kept off the crown, is enough for the year.
Follow it with two inches (5 cm) of leaf mold or garden compost over the root area. This does more than feed. It keeps the surface roots cool through summer, holds moisture in the dry weeks when the leaves are expanding, and suppresses the weeds that would otherwise need a hoe. Lay it on and let the worms work it in.
What you must not do is dig. Hellebore roots are thick, fleshy and concentrated in the top few inches of soil, and a fork pushed into the bed to lift a neighboring plant or to turn the ground in autumn cuts through dozens of them. The damage does not show for weeks and then appears as a clump that flowers poorly and never quite recovers. Treat the ground within about a foot (30 cm) of each crown as permanently off limits.
| Job | When | How |
|---|---|---|
| Cut off old leaves | Late winter, before flower stems lengthen | Every leaf at ground level; bin them, do not compost |
| Remove spent flower stems | Once the seed pods begin to swell | Cut at the base, keeping a few pods only if you want seedlings |
| Feed | Straight after flowering | Slow-release fertilizer or rotted manure on the surface, off the crown |
| Mulch | Same visit as the feed | Two inches (5 cm) of leaf mold over the roots, an inch clear of the crown |
| Water | Any dry spell while the new leaves expand | A slow soak over the whole root spread, not a splash at the crown |
| Weed | Whenever weeds appear | By hand or cut at soil level. Never hoe near the crown |
| Remove damaged leaves | Any time you see heavy blotching | Take the worst leaves out individually rather than shearing the clump |
Water while the leaves are growing, not on a schedule
A hellebore does its growing at the opposite end of the year from most perennials, so the watering logic is inverted too. The critical period is the spring after flowering, when a full year's worth of leaves is being built. Soil is usually moist then, but a dry few weeks at that stage produces small, hard foliage and a visibly poorer clump the following winter.
Check by pushing a finger two inches (5 cm) into the soil under the mulch. If it is dry at that depth, soak the whole root spread slowly and then leave it until it is dry again. In midsummer an established clump in decent soil, under mulch and in some shade, will mostly look after itself, and a plant that wilts slightly on a hot afternoon and recovers by evening is not in trouble.
Plants in containers are the exception and need checking twice a week in warm weather, since the fleshy roots fill a pot quickly and dry out faster than you expect. Never leave a pot standing in a saucer of water through winter, because cold, saturated soil around the crown is how hellebores rot.
The flowers face down, and that is not a fault
New growers are often disappointed that hellebore flowers look at the ground. This is not a defect, a lack of light or a sign of poor feeding. The flowers hang because the plant blooms in the coldest, wettest part of the year and a nodding flower keeps rain out of the nectaries and off the pollen. Bumblebees, which are the main pollinators at that time of year, are entirely happy to work upside down.
There is nothing you can do to make an established plant face outward, so the answer is to place the plant rather than to change it. Grow hellebores on a bank, on the top of a low retaining wall, along the edge of a raised bed or beside steps, where you look at the flower from below rather than above. On flat ground, plant them where you pass close by, so it is natural to crouch and tip one up.
Cut flowers behave the same way. If you float the flower heads face-up in a shallow bowl of water rather than trying to arrange them in a vase, you get to see the markings inside, and they last for days. Take the whole flower head with a very short stem for this, since long-stemmed cut hellebores wilt quickly unless the stem base is slit or briefly dipped in hot water.
Look inside the flowers before you decide which plants you like best. The markings, spotting and coloring that make a hellebore worth having are almost all on the inner face, and a clump that looks plain from a standing height is often the best one in the bed.
What to write down
The most valuable single entry in a hellebore record is the date you cut the old leaves off, together with how far the flower buds had come along at that point. Too early and you are cutting for weeks before the flowers arrive; too late and you are cutting flower stems by mistake. Two or three years of notes locks that window down to within a week for your own garden.
Beyond that, record the date the first flower opened on each clump, how many flower stems it carried, the date you fed and mulched, and the first date you saw black blotching on the foliage. Note the position of each plant too, because hellebores dislike being moved and you will want to know exactly where the good ones are before anything else gets planted near them.