Problems with new penstemon and balloon flower

Asked June 13, 2018, 8:50 PM EDT

I have some new plants from the Resource program that are struggling. Attached are photos of the leaves from the balloon flower, which are browning, and from the penstemon (I believe) with white spots. They are planted in good soil but may be getting too much sun (6 hrs, and of course it's been hot). I planted 2 weeks ago, and I've been giving some extra water (1 gallon every 4-7 days). Can you tell me what the browning and spots may be due to (e.g., too much sun, too little water, too much water)?

Boulder County Colorado

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