These are both Verbena Bonariensis. Both were sown on the same day, both under the same conditions to germinate (heating mat during the day, off at night, under metal halide lamps.) Once they germinated, these were moved under fluorescent grow lights because I needed room for others. Just the 4' full spectrum bulbs you buy at the big box stores, nothing special.

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These I kept under the metal halide lamp and they are so much bigger!

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So I guess it really makes a difference, I think I need to trade those shop lamps for something better. I don't think I can afford another metal halide lamp, not so much because of the initial cost, but the strain its putting on my electric bill. Anyway, just wanted to share.