Answer: All lavenders thrive in full sunshine, in fast-draining soil that's kept on the dry side. It sounds as though you're overwatering your lavender! Wait until the top inch of soil dries out completely before watering. Lavandula angustifolia 'Hidcote' has rich purple flowers on 10"-15" long spikes, and a compact growth habit, making it one of the best lavenders for situations such as yours. You may want to replace those lavenders that are not doing well with Hidcote. When replanting, amend the soil with organic matter to facilitate good drainage, then water deeply only once a week. By reducing the amount of water your plants receive you'll help them regain their health and recover completely. Good luck with your plants!
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