IF : Citrus, Postcard

Citrus_postcard2

OK. I reposted after posting and being 'dissatisfied' with a few details. Here's the final painted version of Citrus. I planned to make postcards for a nice summery promo postcard but I'm on the fence. Is this strong enough to use? Could I (should I) spend another two days working on something else? I think I need to step back, work on something else and look at it again later. Opinions?