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Ivy Geranium

Ivy geranium cascades splendidly from planters.

Venice in Italy is an ideal situation in which to demonstrate the potential of ivy geranium, Pelargonium peltatum. Because garden space is so minimal, potted plants that cascade from balconies above the canals are quite popular. Ivy geranium cascades so splendidly that some eventually reach the tops of downstairs windows from their upstairs balconies.

Ivy geranium can sprawl over shrubbery to seemingly climb a few feet high. Otherwise, it is unlikely to stand much more than a foot and a half high on the ground without support. If cascading over the edge of a planter, upward growth may be only several inches high. In window boxes, it obstructs minimal sunlight. However, it may hang six feet downward!

Ivy geranium propagates somewhat easily by cuttings of the almost succulent stems, but not as easily as zonal geranium. Its lobed, rounded and quite fragile leaves are about an inch long and two inches wide. Sporadic but continual bloom becomes more profuse for late summer and autumn. Flowers might be white, pink, red, lavender, purplish or striped.

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String Of Pearls

Weird but elegantly pendulous string of pearls likes to hang around. It cascades nicely from hanging pots or tall urns.

It is difficult to see how string of pearls, Senecio rowleyanus, is related to much more colorful daisies and asters. The small, fuzzy and sickly white flowers are not much to look at, and only clutter the elegantly pendulous and oddly succulent foliage. The round leaves are light bluish green, so actually resemble peas more than they resemble pearls. The stems are so very thin and limber that they can only stand a few inches high, but can cascade to three feet!

Although evergreen, stems of outdoor plants can be cut back while dormant through winter to promote fresher growth in spring. The pruning scraps are very easy to propagate as cuttings. Roots are undemanding and sensitive to rot, so should be allowed to get nearly dry between watering. Bright ambient light without too much direct sun exposure is best. Incidentally, all parts of Senecio rowleyanus are toxic.

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Burro’s Tail

My pictures are missing, so I found this one online without copyright protection. It demonstrates the cascading habit of burro’s tail.

Back when big spider plants or Boston ferns suspended in fancy beaded macrame were all the rage through the 1970’s, burrow’s tail, Sedum morganianum, was an unusual but also trendy succulent perennial for sunny spots in the home or sheltered and slightly shaded spots in the garden. The refined foliar texture and light bluish green color contrasted nicely with the big and deep green leaves of comparably trendy philodendrons. The thin stems are too limber to stand up, but cascade excellently. Plants in the garden that get pruned back while dormant in winter can easily get two feet long through summer. Without pruning, big plants can get longer than six feet. Pruning scraps and even the small but plump leaves can be rooted and grown into new plants. It is impossible to prune or even move burro’s tail without dislodging some of the leaves anyway. Watering should be regular but not excessive, but then minimal for plants in the garden through winter.

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Rat Tail Cactus

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Not many cacti cascade from planters.

When first imported to Europe from the Americas, cacti were very strange. Their distended green stems do all the photosynthesis. Vestigial leaves develop into sharp protective spines. Vestigial stems develop into more formidable thorns. One of the first cacti imported is among the weirdest. Rat tail cactus, Aporocactus flagelliformis, develops pendulous stems that do not stand upright.

In the wild, rat tail cactus cascades from rocky ledges and crotches of trees. In home gardens, it cascades splendidly from elevated planters or hanging pots. Pruning scraps make good cuttings to plug into loose stone or broken concrete retaining walls. Rat tail cactus likes warmth, but also some partial shade from hot afternoon sunshine. Yellowish stems appreciate a bit of mild fertilizer.

Old stems grow longer than three feet if they get the chance. However, they discolor with age. Pruning them out from the base promotes healthier and more compact growth. Most stems emerge from the base, with minimal branching beyond the base. Bloom is slightly purplish pink. Individual flowers are about two inches long and slightly wider than an inch. They last for three or four days.

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Hanging Planters Need Extra Attention

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Some plants cascade nicely from pots.

With few exceptions, plants dislike confinement of their roots. They prefer to be in the ground where they can disperse roots freely. Houseplants stay potted because of a lack of other soil inside. Some plants live in pots for portability. Some plants just happen to look good in pots. Plants in hanging planters conform to any combination of these and other reasons. They serve their purpose.

Most hanging planters are simple pots suspended by three wires, chains or strands of plastic, jointed at a hook or loop. The hook or loop hangs from a hook affixed to a ceiling, eave, rafter, beam or tree limb. Hanging baskets are pot-shaped mesh or metallic baskets outfitted with fibrous lining to contain the medium within. Small plants or cuttings can grow from holes cut through the lining.

Of course, hanging planters for houseplants are generally pots instead of baskets, which are too messy for inside. They are likely also outfitted with big saucers for drainage. Hanging planters just happen fit well into spaces that are not useful for much else, such as up near a ceiling in a corner. Many of the most popular houseplants just happen to cascade splendidly from hanging planters.

Portability is another advantage of potted plants. Hanging planters that contain frost sensitive plants outside can spend winter in sheltered situations. Orchids and epiphylums that are prominently displayed during bloom can return to less prominent spots when finished.

Hanging planters are popular mostly because some plants simply look better in them. Cascading houseplants like Boston fern, pothos and spider plant, might look a bit mundane on flat surfaces. Many low growing bedding plants are more impressive if suspended at eye level than they are in the ground. Some bedding plants and small perennials excel at cascading from hanging planters.

However, hanging planters are very different from the ground. Because of limited root dispersion, potted plants rely more on regular watering than those in the ground. Because they are exposed to open air, they dry out fast, so crave more water.