This new and distinctive nandina is a selection of Nandina Gulf Stream with brighter and longer lasting foliage color. Obsession Nandina has a compact, dense growth habit, and brilliant deep red new foliage all spring and summer.
We suggest when planting your newly purchased Obsession Nandina plants that you dig a hole twice as wide as the root system but not deeper. Depending on the quality of your existing soil you may need to add a locally sourced compost or topsoil to the back-fill soil. We do not recommend using straight topsoil or compost as a back-fill soil because more times than not these products will retain entirely to much moisture and will cause the root system to rot. Adding compost or topsoil will help the young feeder roots of Obsession Nandina to spread through the loose, nutrient rich soil, much easier than if you used solely the existing soil which more times than not will be hard and compacted. The most common cause of plant death after transplanting is planting the new plant to deep. That is why we do not recommend planting in a hole any deeper than the soil line of the plant in the pot. A good rule is that you should still be able to see the soil the plant was grown in after back-filling the hole. It does not like to have wet feet and may develop root rot if the soil is wet most of the time. Bio-tone starter fertilizer is a great starter fertilizer that provides plants with mycorrhizae fungus. It is a naturally occurring beneficial fungus that colonizes on the new growing roots of plants. It creates a barrier between the roots of the plant and fungus and pathogens that can cause root rot. We love this product and use it on all plants we install in our own gardens. Bio-tone is a gardeners best friend and can help guarantee your success.
After back filling and lightly compacting the 50/50 mix of existing soil and compost give the Obsession Nandina a good deep watering. This is not to be rushed. Most of the water you put on the plant at first will run away from the plant until the soil is soaked. A general rule of thumb is to count to 5 for every one gallon of pot size. For example a one gallon pot would be watered until you count to 5 a three gallon pot would be 15 and so on. Check the plant daily for the first week or so and then every other day there after. Water using the counting method for the first few weeks. You’ll want to water the bushes regularly after planting until they’ve been well established. We like to tell folks that when watering Nandina's or any plant for that matter its best not to water the foliage of the plant. Water at the base of the plant near the soil line only. Gator bag Jr. can be used to help aid in this process and also provide plants with a good soaking due to the slow release of the water into the root-zone of the plant. Soaker Hoses can also be used to water when planting a long hedge.
How do I fertilize Obsession Nandina?
Plants such as Obsession Nandina grow best if they are fertilized once in the spring and again in early summer. Obsession Nandina favors nutrient rich soil and ample fertilization that is why we recommend an Organic fertilizer which tends to release nutrients over a longer period. Obsession Nandina benefits from an fertilizer which can help raise the nutrient level of the soil such as Plant-tone by Espoma. When selecting a fertilizer for your Obsession Nandina, if soil Ph is not an issue a simple balanced fertilizer can be used such as Tree-tone. Either chemical fertilizers or organic matter can be used successfully. Since an organic method of applying manure and/or compost around the roots, produces excellent results and also improves the condition of the soil, this would be an excellent first line of attack. Organic additions to the soil can also be combined with a shot of chemical fertilizer for maximum effect. If chemical fertilizers are used on your Obsession Nandina, applying a slow-release, balanced fertilizer once a year in the spring is probably the simplest solution. There are many slow-release fertilizers on the market. If you can find a fertilizer formulated for shrubs and trees, this fertilizer would work well on Nandina Obsession. However, slow-release is certainly not the only way to fertilize nandinas such as Obsession Nandina although truth be told I feel its the best. A less expensive fast release fertilizer such as a 10-10-10 will work just as well if applied twice during the summer. If you are looking for a fertilizing routine tailored to your specific conditions, a soil sample should be taken and the fertilizer and trace elements matched to the needs of your soil. Don't fertilize Obsession Nandina after August In the North. Fall is the time for nandinas to begin preparing for dormancy. Fertilizing at this time may stimulate new growth that will be too tender to withstand the winter. In the South, a late summer into September application would be about right. As mentioned one spring application of a balanced fertilizer should more than suffice. The amount of chemical fertilizer used per plant will vary with the size of the plant and it's root system. Over-fertilization can be much more detrimental than under-fertilization. "Fertilizer burn" can occur when too much fertilizer is applied, resulting in a drying out of the roots and damage or even death of the plant. It is much, much better to err on the side of too little fertilizer than too much. When roots are burned, the first sign is often scorched looking leaves. If over-fertilization is severe, the plant may just wilt and die. Obsession Nandina is very easy to grow however it may be helpful to know that a very small plant which is planted in the ground will take about 1/8 - 1/4 cup of espoma organic shrub-tone fertilizer. When fertilizing nandinas in containers, be careful to apply a fertilizer that will not burn the roots (such as a slow release or a liquid fertilizer). A very large shrub nandina in the ground will take 2 - 3 cups spread around the drip line of the branches (not next to the trunk). This is a very loose estimate, so please read the directions on the fertilizer before applying it. Never fertilize a plant with a chemical fertilizer if the plant looks sick or wilted. If a plant is struggling due to a disease or root problems, the fertilizer will only add stress to it's life. Try to cure the problem before adding fertilizer. For a totally organic approach, many gardeners use commercial manure on the soil around roses such as Obsession Nandina. Excellent results have been reported after using composted manure. Commercial manure or compost can be applied yearly around the base of the nandina. As with chemical fertilizers, do not apply it right next to the trunk or stems emerging from the ground.
How do I mulch Obsession Nandina?
We highly recommend that you mulch your Obsession Nandina with either a ground hardwood mulch or a ground cypress mulch depending on your local availability. Any type of mulch will do but cypress or hardwood mulch will be of a higher quality and provide better nutrition overall as they breakdown. Mulching helps to keep weeds away which will compete with your new investment for water and nutrients. A 2 to 3 inch layer of mulch is sufficient but remember to take care not to cover any part of the stem of the plant with mulch. Its better to leave a one inch gap of space between the mulch and the stem or trunk of the plant.
How do I prune Obsession Nandina?
Nandina Obsession is shrub that should be pruned in the late winter to encourage new growth. However Smaller Nandinas such as Obsession Nandina rarely need pruned. In general gardening terms, pruning is probably the most misunderstood gardening chore, and certainly, the chore that is most likely neglected. When we specifically look at pruning with regards to roses, this misunderstanding and negligence can be magnified. Pruning has been described as a “combination of art and science.” I personally find pruning to be one of the most relaxing yet rewarding chores in the garden. Pruning a specific plant to look a specific way, involves art in creating a unique definition for a specific plant, and it involves science in understanding the physical growing habits of the plant to be pruned. The most important reason for pruning Nandinas is to improve the overall health of the plant which in turn will reward you with a flush of new growth. Removing the dead and dying limbs will minimize the possibility of diseases such as “die back” and will also allow the plant to re-concentrate its energies and produce many more foliage. Another reason for pruning nandinas such as Obsession Nandina is to re-define the plant’s definition within the landscape. Many times, a plant may outgrow its intended size in the landscape, and must be pruned to re-define its purpose. Pruning should always be associated with re-invigorating a plant by allowing it to focus its energies on producing more vigorous branches, foliage, and flowers. It is important to always use sharp tools when pruning nandinas or any plant for that matter. Knives, hand cutters, saws, and shears should be sharpened if necessary before pruning any roses. A sharp cut will heal quicker than a jagged cut, which will also minimize the likelihood of disease investing a cut during pruning. It is generally recommended to not use power equipment such as gas hedgers to prune nandinas or any plant in my opinion. See more Nandinas here.