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AzulOscuro - the saying having a green thumb refers to someone who is good at gardening.
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BreakForTheLight - Some herbs would be nice. I have parsley, oregano, thyme, cilantro, basil and chives growing. I find basil, cilantro and oregano the easiest. I grew the parsley and thyme from seed and it took three tries to succeed. I never had luck with chives from seed so I bought a plant.