Bulbs Foliage Lingers After Bloom

80418thumbDaffodils, freesias, lilies, snowdrops and the various early spring blooming bulbs and bulb like perennials will be finishing soon if they have not finished already, leaving us with the annual question of what to do with the foliage after bloom. The plants will not bloom again until next year, and the remaining foliage might be unappealing without bloom. Much of it slowly deteriorates into summer.

Bulbs that were forced have probably exhausted their resources, so are not likely to recover. Formerly forced daffodils and narcissus can go into the garden, but after the foliage dies back, they will probably never be seen again. Regeneration is possible though. Forced hyacinths and tulips are not likely worth the effort. They do not get enough chill here to bloom reliably in spring anyway.

Daffodils and narcissus (and for those who insist on growing them, hyacinths and tulips,) that bloomed out in the garden will need to retain their foliage long enough to sustain regeneration of new bulbs that will bloom next spring. As long as the foliage is still green, it is working. When it withers and turns brown, it is easy to pluck from the soil, leaving new but dormant bulbs in the soil below.

Some of us like to tie long daffodil, narcissus and snowdrop foliage into knots so that it lays down for the process; but this only makes it more prominent in the landscape than if it were just left to lay down flat. Freesias are experts at laying down, which is why they might have needed to be staked while in bloom. The foliage of many early spring bulbs is easier to ignore in mixed plantings.

It is even easier to ignore if overplanted with annuals or perennials that are just deep enough to obscure the foliage. Shallow groundcover might work for some of the more aggressive bulbs. Bulb foliage will need to be tucked under. Flower stalks should be pruned away from bulb foliage, not only because they are the most unsightly parts (if not concealed), but also because developing seed or fruit structures divert resources from bulb development.

Snowdrops

80221Where winters are more wintry, garden enthusiasts get to brag about their snowdrops as they emerge and bloom through melting snow. Diminutive white flowers against a backdrop of white snow may not look like much to us. We have more colorful flowers through winter, without the snow. Their kind of snowdrops, Galanthus specie, need more winter chill than they would get here anyway.

We have our own kind of snowdrops though. Leucojum aestivum does so well without significant winter chill that it can naturalize, and sometimes shows up in well watered gardens and riparian areas without being planted intentionally. Leucojum vernum is similar, but blooms with only single or paired flowers, rather than three or more small and pendulous flowers on each arching stem.

The rubbery leaves are about half an inch wide and a foot tall. They stand rather vertically, and can get nearly twice as tall if they need to grow through groundcover. The flower stalks are about the same height, and with the weight of the drooping flowers, might lean a bit outward from the foliage. Each flower has six white tepals with a yellowy green spot near the tip. All plant parts are toxic.

Six on Saturday: Weeds of Felton Covered Bridge Park

 

Although it is not my own garden, I have obtained some of my plants here, and have planted a few here too. I write about or mention Felton Covered Bridge Park too often to bother posting links to other posts about it. #1 and #2 are not exactly weeds, but were not planted here either. They were likely taken by the San Lorenzo River from gardens upstream, and deposited here.

1. Snowdrop! It seems that everyone else has been posting pictures of theirs, and I had nothing to brag about. I did not know they were here. However, these are Leucojum aestivum rather than a species of Galanthus.

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2. Daffodil foliage emerges annually, but gets cut down by the ‘gardeners’ with their weed whackers. This is only the second time they have bloomed.P80210+
3. Periwinkle is a prolific weed throughout the Santa Cruz Mountains.P80210++
4. English daisy is a prolific weed in lawns in mild climates. Most if not all of the lawns in Golden Gate Park in San Francisco are infested with it; but it is too pretty to dislike.P80210+++
5. Dandelion is another prolific lawn weed that is easier to dislike.P80210++++
6. Dandelion seed is very abundant and very easily blown about.P80210+++++
This is the link for Six on Saturday, for anyone else who would like to participate:

https://thepropagatorblog.wordpress.com/2017/09/18/six-on-saturday-a-participant-guide/

Bulbs Are Not Finished Yet

41015thumbIt might seem creepy to think about what spring bulbs are doing right now out in the garden. Like victims of a horror movie, they were buried in shallow graves last autumn. They were not dead though. They were undead but merely dormant. While no one can see what they are up to, they disperse roots and begin to push new foliage up to the surface of the soil. Some might bloom soon.

Now it is getting to be time for summer bulbs. Unlike spring bulbs, summer bulbs do not prefer to hang out in the garden through the cool and rainy weather of winter. If planted too early, they can start to grow prematurely, and could potentially get damaged by frost. If planted much too late after winter rain, they will need to be watered more carefully while young, and are likely to bloom late.

Just like spring bulbs, most summer bulbs are really corms, rhizomes, tubers or tuberous roots. Only a few are actual bulbs. Although they are very different physiologically, they perform the same function. They store resources from a previous season through dormancy in order to sustain growth for the next season. Some summer bulbs bloom more than once annually or with many blooms.

Dahlia, canna, crocosmia, hardy orchid (Bletilla) and the old fashioned big white calla are some of the easier to grow summer bulbs. Dahlia is the most colorful, but blooms late in summer or early autumn, and might only perform well for a single summer. With regular watering, canna can grow like a big weed, but in a nice way. The others can grow well enough to get invasive over the years.

Gladiolus and lily will probably bloom for only one summer, but are so colorful that those who enjoy them do not mind. Tuberous begonia is fussier, so is usually grown in pots. Allium, astilbe and maybe liatris have potential to thrive and multiply in the right conditions, but more often bloom for only a few years. Small colored callas are unpredictable too. They are showy but rarely prolific.

After bloom, deteriorating flowers should be pruned away to conserve resources while lingering foliage recharges bulbs for the next winter. This process is known as ‘deadheading’. Gladiolus, lily and any others bulbs that bloom only once obviously need to be deadheaded only once. Dahlia, canna and others that bloom over an extended season will want to be deadheaded a few times.

Plant Spring Bulbs In Autumn

71115thumbOf all the gardening chores, planting dormant bulbs is probably the least gratifying. All we do is dig a hole to the required depth and width, set a few unimpressively dormant bulbs with the correct orientation and spacing, and then fill the hole with the same soil that was removed from it. The process gets repeated until all the bulbs are planted. Soil amendment and fertilizer might be added.

There is nothing to show for our efforts. When finished, only bare soil remains. We might want to plants flowering annuals or a light duty ground cover over the bulbs, or we might just spread mulch. If soil amendment is needed, it should be mixed into the soil at the bottom of the planting holes. Fertilizer can get dispersed over the surface of the soil after planting. There really is not much to it.

Planting bulbs is also a chore that is easy to forget about until it is too late. If we do not see them in nurseries, we might not think about daffodil, narcissus, hyacinth, grape hyacinth, freesia, tulip, crocus, lily, anemone, ranunculus, iris or other spring bulbs until we see them blooming next spring. Yet, this is when their dormant bulbs, corms, rhizomes, tubers and tuberous roots get planted.

Many types of bulbs become available in nurseries at the same time, and can be planted as soon as they become available. It might be too early to plant those that are not yet available. Gladiola, dahlia, allium, calla and canna are summer bulbs that will become available later because they likely should get planted later, although calla and canna do not seem to care when they get planted.

Daffodil, narcissus and grape hyacinth are probably the most reliable spring bulbs for naturalizing. Bearded iris is likewise very reliable, but needs to be dug, split and groomed every few years. Freesia and crocus may not naturalize as reliably. Lily, tulip, anemone, ranunculus and hyacinth are spectacular in spring, but are unlikely to naturalize because they prefer more of a chill in winter.

Some bulbs can be phased in their first year. For example, if freesia flowers are expected to last about a week, a second group of bulbs can be planted about a week after the first. A third group can be planted about a week after the second, and so on for a few weeks until the planting season ends. As the first group finishes bloom in spring, the second group begins to bloom, and so on.