African Daisy

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African daisy excels as bulb cover.

They are more than just shrubbier and more colorful versions of the formerly stigmatized trailing African daisy. Modern African daisies are actually various hybrids of several other species. Extensive breeding complicated their lineages enough for them to be known by cultivar names rather than by species names. To one degree or another, most are probably related to Osteospermum ecklonis.

These fancier modern hybrids of African daisy grow as annuals in harsher climates. If planted just after the last frost date, they bloom splendidly for early spring, and continue to bloom sporadically through summer. If they grow and bloom a bit too well, they may like to be trimmed back to bloom some more. Locally, they persist through winter as short term perennials, to bloom as winter ends.

Bloom provides pastel hues of yellow, orange, pink, ruddy pink, lavender, purple or white. Early spring bloom is most profuse, particularly for fluffy plants that were not trimmed back over winter. The biggest sprawling plants should get trimmed back after bloom. Subsequent sporadic bloom, mixed with random profuse phases, is inhibited only by warm summer weather and cool winter weather.

African daisy wants full sun and regular watering. Mature plants get about two feet deep and broad. If pressed into the soil, outer stems can develop roots to grow as new plants, as the original dies.

Hobbit’s Pipe

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Jade plant has some weird cultivars.

Good old fashioned jade plant has a few interesting cultivars (cultivated varieties) that exhibit variations of color, texture and form. Hobbit’s pipe, Crassula ovata ‘Hobbit’, is similar to classic jade plant in form and color. It is only slightly lighter green, and only a bit shorter. The succulent stems are just as plump and gray. The small and round-topped clusters of pale pink or white flowers that bloom sporadically are just as unimpressive. What is unique about hobbit’s pipe is the weirdly tubular foliage. Each leaf is rolled into a cylinder, with a hollow tip.

Mature plants do not often get much more than two feet tall and broad, although they have the potential to get twice as large. Because they are more sensitive to frost than other jade plants, hobbit’s pipe should be grown in sheltered spots, or pots that can be moved to sheltered spots through the coldest part of winter. Foliage that is too exposed during the warmest weather of summer can get roasted. Hobbit’s pipe can tolerate a slight bit of shade, so can be happy as a houseplant.

Recycle And Repurpose Overgrown Perennials

60720thumbJust like anything else that gets planted in the garden, new perennials seem to be so cute and innocent. They get even better as they mature. Some grow and spread to impressive proportions. Then . . . some perennials get to be too large. Some get overgrown enough to obscure their own appealing characteristics or other plants. Others get crowded enough to inhibit their own bloom.

Lily of the Nile, which is one of the most common and resilient of perennials, grows and blooms indefinitely. It does not spread too quickly, but eventually creeps a few feet every decade or so. However, if it is too healthy, individual shoots can get too crowded to bloom as prolifically as they want to. Also, shoots that get too close to walkways or other plants eventually become obtrusive.

Anyone who has tried to shear encroaching foliage of lily of the Nile knows that doing so ruins the natural lushness of the foliage. Once scalped, it will stay that way until obscured by new foliage that will be just as obtrusive as the removed foliage. The only remedy is to remove the shoots that produce the foliage, leaving the shoots behind them with adequate clearance for their foliage.

Lily of the Nile shoots are not easy to remove. Their rubbery roots have quite a grip! Yet, once removed, the stout stems can be planted as new plants wherever more new plants are desired. They only need to be watered regularly for the first few months until winter, so that they can disperse roots. If dug and replanted in autumn, they generate roots over winter, and are ready to go by spring.

Overly congested colonies of lily of the Nile, as well as African iris and New Zealand flax, can be dug, split into individual shoots, groomed of deteriorating foliage, and then replanted. Because New Zealand flax has such big leaves, it should be processed in autumn or winter; and its leaves should be cut short so that they do not get tattered and floppy while new foliage and shoots grow.

Bird of Paradise can be divided similarly, but carefully because the shoots are surprisingly fragile. However, giant bird of Paradise is a completely different animal. The tallest trunks eventually begin to deteriorate, so get cut down like trees. Basal shoots are left intact to replace them, so only get divided if obtrusive or overly abundant. Most perennials prefer to be divided after bloom.

Canna and calla prefer to be dug and relocated as their foliage dies back after bloom, just before new shoots develop. However, new shoots often develop before older foliage must be cut back.

Creeping Saint John’s Wort

90717This is not the dreaded aggressively invasive Saint John’s wort that has naturalized in other regions. Nonetheless, creeping Saint John’s wort, Hypericum calycinum, does precisely as the name implies. It creeps, and has naturalized to a less aggressive degree in many spots near the coast. Its vigor is an advantage to many landscapes, but might eventually displease adjacent neighbors.

Creeping Saint John’s wort is a somewhat rustic perennial ground cover that does not need much water once established. It naturalizes in coastal climates because it gets all the water it needs from annual rainfall there. Although evergreen, it looks best if mown as winter ends. It happens to be susceptible to rust, and mowing removes much of the old foliage the the fungus overwinters in.

One to two inch wide bright yellow flowers, with five petals and prominent stamens, start to bloom in June and continue into September. By that time, the paired leaves might be getting tired if not watered, or infested with rust, but should stay presentable until mowing at the end of winter. Crowded plants might get three feet high. Otherwise, growth does not get much more than a foot deep.

Zonal Geranium

60525New and improved is not always better. Modern garden varieties of zonal geranium, Pelargonium X hortorum, with bigger, fuller and more profuse blooms, are more colorful than the relatively weedy classic varieties, but they are considerably more demanding. In fact, because they are so unhappy through winter, they are often grown as warm season annuals instead of as perennials.

They are certainly worth growing though, and are reasonably easy to propagate from cuttings. Flowers can be red, pink, white, peachy orange or almost purple. Bloom is almost continuous. Each rounded dark green leaf might be adorned with a darker halo about halfway between the center and the outer margin. Mature plants do not get much more than three feet tall, and not much wider.

Old varieties might get twice as tall, with smaller blooms, and lighter foliage.

Some Annuals Are Really Perennials

90529thumbAnnuals are plants that complete their entire life cycle from germination to death within a single year. Biennials complete their entire life cycle in two years, mostly by developing vegetative growth during their first year, and then blooming, producing seed and then dying after their second year. Perennials are the many herbaceous plants that survive longer than just a few years or indefinitely.

As simple as these definitions seem to be, the plants that they describe are a bit more complicated. Some biennials can regenerate from the roots of plants that have already bloomed and died. Stems of some annuals can root where they touch the ground, to form new plants that survive for another year. Some annuals seem perennial if they replace themselves with their own seedlings.

Of course, none of that matters for the many biennials, perennials and self perpetuating annuals that get grown as mere annuals. At a time when ‘sustainability’ is a fad and trendy buzz word, it is ironic that so many bedding plants that could contribute more if given the chance to do so, continue to get discarded as soon as their primary season finishes. Most have more potential than that.

Self perpetuating annuals like sweet alyssum and nasturtium might only need to be groomed of old plants as new ones take over. Young nasturtium are rather efficient at overwhelming their own parent plants to some degree. Of course, subsequent generations will revert to feral plants. Fancier nasturtium will eventually become basic orange and yellow. Sweet alyssum will be plain white.

Many annuals that are actually perennials might survive through their off season if just overplanted with more seasonal annuals, and then regenerate when the weather becomes more favorable. For example, primrose from last season might be left in the ground as petunias take over for summer, but when the petunias finish next autumn, the primrose can regenerate for another season.

Such perennials regenerate more randomly than they grew in their primary season, and will need some degree of grooming and perhaps mulching.

Perennials Can Divide And Conquer

10810Along with all the bare root fruit trees, roses and cane berries, nurseries also stock bare root perennials like strawberries, asparagus, horseradish and rhubarb. They are so easy to plant while dormant. They recover from transplant through spring, and by summer, should be growing as if they had always been there. Although, if they had always been there, they might be crowded by now.

Yes, many but not all perennials eventually get crowded. Strawberries spread by runners, so are easily plucked and transplanted to avoid overcrowding, as well as to propagate more productive plants. Asparagus are variable, so may not get crowded for decades. Horseradish and rhubarb may not mind getting crowded, but could be more productive if individual plants have their space.

For example, crowded horseradish plants produce many small roots. If dug, split apart, and replanted with more space between individual plants, the individual roots get much larger. Separating the roots, which is known as ‘division’, also produces many more new plants. Mature rhubarb plants may not mind being crowded, but are often divided simply to propagate new productive plants.

Division of these sorts of perennials is typically done while they are dormant through winter. If that sounds familiar, it because it is the same reason why these sorts of perennials are available as bare root stock. They get processed while they are unaware of what is happening, and wake up in their new and better situations. Many defoliate while dormant. However, most are evergreen.

Ornamental perennials like lily-of-the-Nile, African iris, New Zealand flax, society garlic, torch lily, lily turf and acorus grass are all good candidates for division if and when they become overgrown. So are most aloes, some terrestrial yuccas, several ferns and some of the more resilient clumping grasses. Agave pups can be dangerous, but really should not be allowed to get too crowded.

Division might be as simple as taking a few pups or sideshoots from a large clumping plant, or as involved as digging an entire large plant to divide each individual shoot. More often, large plants get dug and split into a few smaller clumps of many shoots. New plants should be groomed of deteriorating foliage. The long leaves of New Zealand flax should be cut in half to avoid desiccation.

The Colors Of Karma

0407160708aThe statute of limitations allows me to discuss this now. It happened thirty years ago, in the spring of 1987. The famous landscape designer, Brent Green, was my roommate in the dorms at Cal Poly, San Luis Obispo. As the bearded iris started to bloom, Brent immediately noticed a bed of uniformly pink bearded iris off the edge of a lawn in the inner campus. He watched it bloom from beginning to end, and occasionally updated me on the progress. During the process, he convinced me that these iris were very rare. Neither of us had ever seen pink bearded iris before. We had no idea that they could easily be purchased from mail order catalogs or nurseries.

Late one warm spring night, Brent telephoned me from a landscape design lab where he had been working late. Back then, we answered a telephone when it rang. Before I could wake up enough to think about what I was doing, or just say “No.”, Brent convinced me to bring something that he needed from our room to the lab. Without thinking, I got dressed, grabbed his designated duffel bag and got on my way. I was sort of concerned that the duffel bag seemed to be empty. I figured that whatever was in it was very lightweight.

By the time I got to lab, Brent was in the lobby, and his associates were leaving. Brent did not seem to be interested in whatever was in the bag. He just thanked me for bringing it as we waked out as if to go back to the dorms. I was puzzled. As we walked, Brent explained that he only needed the bag, and confirmed that it really was as empty as I suspected. I was even more puzzled. I asked why he woke me up in the middle of the night to deliver an empty bag across campus. Well, in the few minutes it took for us to get this far into the conversation, we had arrived at the bed of pink iris. You can imagine what happened next.

Yes. Brent dropped the bag on the ground and began to stuff it full of all the bloomed-out iris rhizomes he could grab! Suddenly, I was very awake, and protested. He explained that now that the iris had finished blooming, they would be dug up and disposed of. What else could I do? I knew he was correct. I did not want to waste the iris. I also realized that panic would only draw attention, and that delaying the process would only increase the likelihood of getting busted. I pulled up as many rhizomes as I could hastily grab as well, and stuffed the bag until it was full. Brent was feeling rather satisfied as we walked back to the dorms. I was mortified.

The rhizomes got split and groomed, and eventually went into our mothers’ gardens. We each got about half. The following late winter and early spring, Brent would check in on his when he would go south for the weekend. I would check on mine when I would go north. They grew well, and fattened up to bloom. The stalks came up. The buds swelled. Then, finally, and with much anticipation, they bloomed! They were magnificent! They were glorious! They were spectacular! They were purple and yellow! WHAT?!?! Where was the pink? What happened? This is NOT FAIR! Wait a minute, . . . Could it be karma?

Thirty years later, we still grow these two bearded iris. They are known simply as ‘Karma Purple’ and ‘Karma Yellow’. We do not know their real names. A few years ago, they were joined by a nice tall ‘Karma White’, which was supposed to be a rusty red that I ‘borrowed’ from a neighbor. Neither Brent nor I have ever grown a pink iris.

Roots

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In the lower right corner of this picture, next to the fenced garden gate, and just beyond the mown grass and what appears to be a walkway, there is a small clump of bearded iris foliage. No one knows where these iris came from, or for how long they had been there when this picture was taken in the summer of 1969. They were growing in the garden of my great grandmother, in Hoot Owl Creek, just south of Red Oak in Latimer County of Oklahoma. It is unlikely that my great grandmother purchased such non-utilitarian plant from a nursery. It was probably acquired from a friend or neighbor sometime during the half century that she tended the garden prior to 1969. It could have been around even earlier, since my great grandfather’s family first developed the farm as Oklahoma became a territory.

The flowers are an alluringly soft lavender blue, on elegantly tall and lean stems. They are relatively small for bearded iris, and lack any fancy frills or ruffles. In fact, they are quite neatly tailored, with a simple sweet and fruity fragrance that resembles that of grape pop. This iris is probably one of the prehistoric specie of iris that was used to breed modern cultivars. Some of these sorts of iris were known affectionately as ‘grape pop’ iris, but it is impossible to know if or how this particular iris is related.

Many years ago, probably in the early 1980s, my grandmother brought some of these iris back to her home garden in Santa Clara in California. They proliferated enough to share with friends and neighbors. A few went to my mother’s garden, where they also proliferated and were shared with friends and neighbors. Now, my mother’s great granddaughters play in a garden where these same iris will bloom next spring; only a few months from now, but at least six generations from that well outfitted homestead garden in Hoot Owl Creek.

Where will these iris go from here? It is impossible to say. Younger generations are not very interested in horticulture. However, I really doubt that my great grandmother could have imagined that they would have gotten this far. What is funny is that these iris are probably more interesting now to current generations than they were to my great grandmother when she planted them.

Fernleaf Yarrow

70830‘Moonshine’ is probably the epitome of fernleaf yarrow, Achillea filipendulina, even though it is technically a hybrid. From the middle to the end of summer, its three inch wide corymbs (flat-topped trusses) of tiny bright yellow flowers stand as high as three feet above ferny and gray basal foliage. Bloom is best in full sun and warm exposure. Established plants do not need too much water.
Most varieties of fernleaf yarrow also bloom with bright yellow or gold flowers. Some might bloom with pale yellow, rosy pink, pale pink, reddish, white or pink and white flowers. All are good cut flowers, and can be dried. Some varieties are more compact. The most compact varieties work nicely in planters of mixed perennials. Butterflies and hummingbirds find them wherever they are.
Pruning out deteriorating blooms may promote sporadic subsequent bloom until autumn. However, some plants may bloom all at once, and then not bloom again until the following summer. Large blooms on the most vigorous plants may need to be staked. New plants can be propagated by division from mature plants. ‘Moonshine’ and many other cultivars are sterile. Others might self sow.