Bottlebrush
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Bottlebrush
Named for its distinctive flowers, this evergreen has bright red flower spikes that are reminiscent of a bottle washer. The bottlebrush is often sold as a shrub, but can grow as a tree up to 25 feet in height. With patience, it can even be trained as an espalier.
Bottlebrush plants (Callistemon spp.) get their name from the spikes of flowers that bloom at the ends of the stems, bearing a strong resemblance to a bottle brush. Grow them as shrubs or small trees that grow up to 15 feet (4.5 m.). Most bottlebrush varieties bloom over a long summer season in shades of red or crimson. One exception is C. sieberi, which has light yellow flower spikes.
Callistemon bottlebrush care consists of regular watering while the tree is young and annual fertilization until it matures. Water young trees weekly in the absence of rain, applying the water slowly to saturate the soil as deeply as possible. A layer of mulch over the root zone will slow the evaporation of water and help prevent weeds. Use a 2-inch (5 cm.) layer of shredded hardwood or bark or a 3 to 4 inch (8 to 10 cm.) layer of light mulch such as pine straw, hay or shredded leaves.
Fertilize bottlebrush shrubs for the first time in their second spring. A 2-inch (5 cm.) layer of compost over the root zone makes an excellent fertilizer for bottlebrush. Pull back the mulch before spreading the compost. If you prefer to use a chemical fertilizer, follow the instructions on the label.
The common name "bottlebrush", perfectly describes this evergreen plant's bright red flower spikes. Hummingbirds love the flowers, and the plant is hardier than most bottlebrushes. The flowers are followed by small, woody capsules that look like bead bracelets on the bark, and which last for years. Offered as a shrub, bottlebrush can be trained as a tree to 15-feet or espaliered as a quick wall cover. It makes a nice screen or tall unclipped hedge. Pruning to develop several trunks and removing some lower branches can create a fine small specimen tree.
A good choice for a spot offering full sun, it will adapt to a variety of soils. Very drought-tolerant once established, bottlebrush tolerates any soil except very poor, alkaline, or poorly drained. Fertilize regularly to maintain good flower color and dark green foliage. Suckers from the trunk need to be removed periodically to maintain tree form.
Cancer therapies often have narrow therapeutic indexes and involve potentially suboptimal combinations due to the dissimilar physical properties of drug molecules. Nanomedicine platforms could address these challenges, but it remains unclear whether synergistic free-drug ratios translate to nanocarriers and whether nanocarriers with multiple drugs outperform mixtures of single-drug nanocarriers at the same dose. Here we report a bottlebrush prodrug (BPD) platform designed to answer these questions in the context of multiple myeloma therapy. We show that proteasome inhibitor (bortezomib)-based BPD monotherapy slows tumour progression in vivo and that mixtures of bortezomib, pomalidomide and dexamethasone BPDs exhibit in vitro synergistic, additive or antagonistic patterns, respectively, distinct from their corresponding free-drug counterparts. BPDs carrying a statistical mixture of three drugs in a synergistic ratio outperform the free-drug combination at the same ratio as well as a mixture of single-drug BPDs in the same ratio. Our results address unanswered questions in the field of nanomedicine, offering design principles for combination nanomedicines and strategies for improving current front-line monotherapies and combination therapies for multiple myeloma.
Honeybees love the blossoms as well. Though thebees are busy doing their job, many people are afraid of them so don'tplace this plant right next to a door or too close to a walkway.Another form of bottlebrush is the dwarf shrub "Little John" which can be kept about 3 feet. And the beautiful weeping bottlebrush tree is a popular small land