Location: Warsaw, Poland
Joined: Tue Jun 01, 2021 3:28 pm
KHP in my country is cheap, it costs like 4$ for 50g
https://allegro.pl/oferta/wodoroftalan- ... 8979148259
Divide the price by 4 to get it in $. I can test how much of KHP must be added to water to get pH=4. I add just small amount of it and it seems to be fine.
I have noticed that another deficiency occurred in some of my plants. Young leaves in some droseras were pale green and their growth was slow. Based on the visual effects I concluded that it could be iron deficiency. I added iron to these plants and they got better. I added iron to other plants too. But caution must be taken with adding iron as it may be toxic to plants in higher concentrations, especially in bog conditions. In this article
https://www.sciencedirect.com/science/a ... 4309003686
authors wrote that some elements (including iron) cannot be completely delivered to CP plants by prey only and plants must uptake it via roots.
I see that growing plants in pure sand may be tricky and may lead to development of nutrient deficiencies, even if plants are regularly fed. I have decided to add a small amount of peat to some plants (some droseras but not VFTs), now it is something like 99% sand and 1% peat. I have also decided to water my plants with RO water that was rinsed through peat. It should provide at least some nutrients to water and acidify it.
I will post some pictures of my plants in near future.