purple leaves - Knowledgebase Question

Newburyport, MA
Avatar for swjp
Question by swjp
April 25, 1998
On a couple of my Salpiglossis & Columbine seedlings the leaves are turning purple. Most of the plants have a normal green color. All were hardened off before being planted out last week, and nightime temperatures have been over 40 degrees. I grew Salpiglossis last year, in the same areas, and didn't notice this problem. Is the discoloration the result of shock or could it be something else?

Answer from NGA
April 25, 1998
If the color change is fairly subtle, or if just a few leaves are turning but the rest of the plant looks fine, then it's probably just the shock of transplanting causing the discolored leaves. Cool temperatures and/or strong sunlight can cause the leaves of even hardened-off plants to discolor. If the new growth comes in looking fine, then I wouldn't worry. A purplish tinge to the leaves can indicate a nutrient deficiency, so if you didn't fertilize the seedlings when they were growing indoors, you may want to do so now.

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