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Pick out a sunny spot for your bean plants. Check your soil pH Add some low-nitrogen fertilizer to your soil.
Black beans love sunlight, so make sure to select a plot that will get full sun during the day. Ideally, your beans should get about 6 hours of sunlight total each day. and amend your soil if necessary. Black beans grow best in soil that has a pH of 6.0-6.5. Get a home pH test kit at your local garden center, or bring in a sample of your soil for testing.  If your soil pH is too low or too high, you may need to amend it. If the pH is too low, you can raise it by adding some lime. If it’s too high, you can add some sulfur. Amending your soil’s pH can take several months, so plan ahead and test your soil well before you plant your beans. Since it's so difficult to change the pH of your soil, you might consider growing your beans in a raised bed if your soil isn't right. Alternatively, you could grown a different bean. Bean plants generally do not need a lot of fertilizer. However, if you’ve grown other plants, especially other bean plants, on the same plot, it may be a good idea to enrich your soil with a bit of organic fertilizer before planting. Select a fertilizer with a low-nitrogen content for ideal bean production. Since it's a vegetable, giving black bean plants too much nitrogen can cause your plants to produce lots of leaves and only a few beans.