jeff wrote:what substrate for your gigantea ?
If that question was meant for me I used a standard 50/50 peat moss and perlite mix. Kept it drier during winter. That seems to work great for my aphrodite.
do you have a dry period for her ?
You might consider using a more open mix
with less peat in it. The peat perlite mix is ideal for bog plants but mexican pings are not bog plants. I use a mix based on turface with the addition of some coarse quartz sand and some aragonite for a little alkalinity. I only use about 20% peat, and sometimes replace this with a cactus mix that has some horticultural lime added.
In some limited experimentation I haven’t seen a huge difference from adding the aragonite but some people have noted a great jump in growth in their giganteas. The thing that made a huge difference for me was adding a little mushroom compost to my mix.
Brown heart is not something I’ve had a lot of trouble with but it has popped up randomly in a couple plants, with no common medium or culture factors that I could identify. I do get the plant affected out of the tray and get rid of the mix that it was growing in.
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