Basil problems

Hi,
I've got two different kinds of basil plants. The first is the Magical Michael type that I grew from seeds just before winter, obviously indoors and in pots, and it now reached about 30cm. The second kind is normal italian basil that I bought from the local supermarket.
All plants go quite 'bushy' so I decided to remove the big and medium leaves to make pesto! That turned out good!!
Anyways... the magical michael ones have leaves where black spots (5mm dia approx) appearing on them. They're not dark black spots but slightly paler.
Furthermore, both kinds have more leaves turning into a golden-brown color.
I do water the plants lightly once a day in the morning, and they get no water in the weeekend.
Am I doing something wrong, is this a fungal infection, overwatering, or what?
Thanks, Max
btw... I'm around Frankfurt, Germany!
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MaxMustermann wrote:

If the potting mix is moist, don't water. If the time of frost is past, you should move them outdoors.
Basil is an annual, living for only one growing season. You can prolong the life of the plant by removing all flower buds before they open. This also improves the flavor since the leaves might get bitter if the plant is allowed to flower. But eventually, you will have to discard the plants and start over.
I just bought a small plastic pot of basil this week, along with dill and sage. I plan to move them to larger pots tomorrow. At first, they will be on my patio, which is in shade most of the day. After they recover from being repotted, I will move them to where my other herbs are in pots, out in the sun.
--
David E. Ross
Climate: California Mediterranean
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