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Daffodils and crocuses are the most popular bulb choices for grassy areas. A few other bulbs, such as tulips, anemone, and grape hyacinths, are also beginner-friendly. These bulbs require little maintenance and naturalize easily in lawns. Bulb size isn’t important. Smaller bulbs like crocuses can grow as well as larger bulbs like daffodils. In areas that experience long, cold winters with temperatures under −20 °F (−29 °C), plant hardier bulbs. Some tulip types, such as Greigii or Darwin bulbs, can grow well. Daffodils and crocuses can also give your yard some flair in spring.  Small, versatile bulbs, such as snowdrops, winter aconites, glories of the snow, and grape hyacinths, are good choices for cold climates. Since you are planting the bulbs in grass, you cannot use mulch to protect them in winter, so only choose bulbs suitable for harsh winters. Warm climates have winters above −5 °F (−21 °C) and warm, dry summers. If summers last late into September and October in your area, choose warm-weather bulbs. In addition to tulips, daffodils, and crocuses, lilies and hyacinths grow well in these areas.  You could plant bulbs that don’t grow as well in northern climates, such as bugle lilies, tritonias, harlequin flowers, and freesias. Be wary when choosing late-blooming bulbs. You will have to plant a slow-growing lawn or keep your grass tall until the bulbs bloom. Visit your local plant nursery for bulb-types suited for your climate. Most bulbs prefer well-draining soil, but a few varieties grow well in wetter soil. Snake’s head can do well in the grass. You might also try wild hyacinth, cannas, guinea hen flower, and summer snowflake. These bulbs should be grown in spots where the soil doesn't drain as quickly. There are quite a few bulb varieties that can grow well in grass, from large daffodils to small crocuses. For a stronger visual effect, choose 1 or 2 plants you like. This way, your bulbs will stand out and look natural in the grass. Feel the bulbs before buying or planting them. Healthy bulbs feel firm to the touch. Any bulbs that have soft spots or show signs of rot are less likely to survive planting. These signs are often seen in older bulbs, which should be avoided.  Damaged bulbs may not survive for very long in grassy areas. They often cannot compete with grass for water and nutrients. For the best results, plant your bulbs soon after you purchase them in the fall so they don’t begin to turn soft or rot.

Summary:
Select daffodils and crocuses to grow bulbs easily. Pick bulbs that can last the winter if you live in a cold climate. Select bulbs suited to long summers if you live in a warm climate. Choose moisture-resistant bulbs when planting in damp soil. Choose a single bulb variety to emphasize its color. Buy firm, undamaged bulbs.