as mentioned, water stress is a "usual and customary" suspect in blossom drop - are the pots themselves shaded? i.e. not a black pot exposed to the hot sun? there's an old adage that tomatoes like the heat but like cool roots. I mulch mine (direct in the soil) very heavy - pots are slightly different.
>>dehydrated milk - for calcium?
calcium "deficiencies" is behind blossom end rot - but the 'deficiency' has multiple sources. lack of calcium is one, but cool temps prevent the plant from utilizing the available calcium - which can explain why the first flush of fruit often has BER but not later in the season. I've found milk to be messy - ground up eggs shells or a crushed Tums tablet works well.
what kind of fertilizer are you using? (N-P-K wise) nutrients do leach out of pots faster than 'soil' - but too much nitrogen can give you "all green, no fruit" - since you're getting a good fruit set, this may not be an issue, but generally, fruiting stuff is very fond of potassium. |