@Too Many Plants! The discussion between myself and an other became somewhat heated and derailed your OP.
@Martin Bohnet & others that read it, my apologies.
@Too Many Plants! Yes for our Spring flowering Iridaceae I've noticed that on occasions the flowers have bleached streaks on the tepals. In habitat that happens when it is hot and dry (both air and soil).
It is worth remembering that in the hot dry areas plants flower early. In the Tanqua Karoo most flowering is over by mid winter before it starts to warm up.
Some shade - from distant trees or even directly overhead (no more than 40%) is beneficial. Even here I have planted trees on the western side of the growing area to provide some coolness in the afternoon.
You're doing a great job growing what are considered difficult plants.
@Martin Bohnet & others that read it, my apologies.
@Too Many Plants! Yes for our Spring flowering Iridaceae I've noticed that on occasions the flowers have bleached streaks on the tepals. In habitat that happens when it is hot and dry (both air and soil).
It is worth remembering that in the hot dry areas plants flower early. In the Tanqua Karoo most flowering is over by mid winter before it starts to warm up.
Some shade - from distant trees or even directly overhead (no more than 40%) is beneficial. Even here I have planted trees on the western side of the growing area to provide some coolness in the afternoon.
You're doing a great job growing what are considered difficult plants.