Lavender grows in loose, slightly sandy or gritty alkaline soil that is fast draining. To learn how far apart to plant lavenders for hedges for different lavender varieties read my article how to space lavenders for hedging. I have been a qualified professional landscape gardener for over 10 years and I'm here to share all my experience with you on gardener report! (Read more about testing pH and lavenders in acidic soils). Varieties of lavender that are suitable for planting in cold climates are: All English lavenders with popular varieties such as: There are Hybrid lavenders that also are considered cold hardy such as: Lavenders are drought resistant plants that are native to harsh climates with little rainfall and well draining, sandy soils. Lavenders tolerate soils that are mildly alkaline (above the pH value of 6.5) but prefer soils that are either pH neutral (7) or alkaline (up to pH 8). In the garden, lavender makes an excellent companion plant for almost anything from roses to cabbage.It is one of those aromatic, gray herbs that deer avoid, making it a great choice as a decoy in your Hosta or daylily beds. Mature lavenders form dense mounds of foliage, ranging from grey to green and from 30 to 60 centimetres tall – beautiful even when they're not blooming. Not Enough Sunlight. I must emphasize the importance of planting lavenders in well draining soil, particularly in cold climates as lavenders that are in cold, consistently moist soils for most of the Winter will likely die from root rot. Therefore lavenders do not require additional fertilizer as this causes that plant to grow foliage at the expense of flowers. Planting in groups … This soil mix will ensure that water from rainfall drains away from the roots efficiently and mimics the soil conditions of Southern Europe where lavenders thrive. Adding fertiliser, perhaps only phosphorus, can correct the problem. Lavenders require a light, sandy soil that drains quickly and they won’t grow well in soil that is heavily compacted or has a high content of clay. Dig a hole that is significantly bigger then the root ball of your lavender and back fill the space with a mixture of 1/3 sand or grit with 2/3’s compost. Cultivars of this species tend to be compact in habit and have grayish green narrow leaves and relatively short compact flower … Excessive pruning can also damage a plant or remove flower buds, especially if done right before flowering in the summer. Lavender is a well known and fragrant plant with gray-green foliage, upright flower spikes, and a compact shrub form. If they are in partial shade then they will likely not grow to their full size, which is a problem if you are planting lavender hedges as there can be significant gaps. Lavenders require full sun to grow to their full potential. A lack of sun will stunt the growth of your lavender and it won’t live for very long, when they can live for 15 years or more with the right care. If the soil retains a lot of moisture then the roots are far more susceptible to the fungal disease root rot which can cause the lavender to stop growing and droop in appearance. English Lavenders are the most hardy and robust when it comes to cold climates. Many lavender plants fail to bloom because of poor care. A lavender plant that refuses to flower can be very frustrating -- after all, the plant's splendid purple blooms and delicate fragrance are among the primary reasons why gardeners grow lavender. Lack of adequate fertiliser, especially a lack of phosphorus, can cause shrubs and perennials to stop flowering.
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