Yellow Streaks on Begonia Leaves - Knowledgebase Question

Derry, NH
Avatar for Sonicnh
Question by Sonicnh
July 5, 1998
My tuberous begonias are planted in pots. They seemed to be doing well, the soil is a mixture of potting soil and peat moss. They have recently developed yellow streaks on the leaves, though the plants still appear healthy otherwise and are developing blossoms.

Answer from NGA
July 5, 1998
Some begonias have variegated leaves, but if yours aren't of that variety, there could be a problem. Many things can lead to yellowing leaves: Are your begonias in a shady place? They are best adapted to shade, and excess sun can cause shade-lovers to form pale leaves. Inadquate moisture is another possibility - begoinas love a humusy, moist, yet well-drained soil. Avoid sprinkling water on the leavs, since this can invite fungal and bacterial diseases. Viral infections somtimes show up as streaks in leaves, as do some nutrient deficiencies.

Begonia leaves will yellow in fall as the tubers go dormant, but that's a ways away! I hope this information gives you some clues to the cause and possible solutions. Let us know if you need anything else!

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