Best Way to Stop Blossom Bottom Rot

Posted by

Blossom Bottom Rot


Blossom bottom rot is caused by the love apple not having the ability to induce enough calcium to the developing fruit. This calcium deficiency isn’t caused by a diseased sort of a fungus or microorganism. (Fungicides and pesticides will not facilitate.)

Blossom bottom rot could occur in tomatoes, peppers, melons, eggplants, squash, and cucumbers Some describe it as a “water-soaked spot”, but to me, it simply appearance black or mushy and rotten.

Why do not the plants get enough Ca to the fruit? this could result in a variety of things, including:

Moisture – insufficient or an excessive amount of – We’ve had dry conditions this summer. Even with mulch, I have lost some tomatoes to blossom bottom rot. Last week I detected from 2 different native friends WHO had issues with rotten, black bottoms on their tomatoes.

Too much nitrogen – Dump a load of recent manure on your tomatoes, and you’ll be rewarded with much-inexperienced growth and black round-bottomed fruit. The nitrogen salts could create the calcium within the soil less accessible to the tomatoes.

Soil too Cold at Planting – a lot of a problem for northern gardeners, cold soil will interfere with nutrient uptake to the plant.

Root harm because of cultivation – Aggressive creating by removal around your plants (for weed control, for instance) could harm the roots. this could conjointly interfere with nutrient uptake.

Soil pH scale too high or too low – Either extreme of pH scale will create it troublesome for your tomatoes to thrive

Susceptible varieties – certain tomatoes varieties are a lot of prone to blossom bottom rot than others.

How does one stop BLOSSOM bottom ROT?

Once you see a black or dark brown spot at the blossom end of tomato fruits, they seem to be a goner.

Prevention and management measures are wherever you would like to focus to salvage the rest of your tomato season. Here are steps you’ll be able to take to limit and management blossom end rot on tomatoes and different crops.


I use a straw mulch to assist maintain even soil moisture levels. If rains fail, confirm to provide your plants a decent soaking one to two times per week. Stick your fingers within the dirt round the tomato and confirm it’s soaked many inches down.

You can conjointly attempt water cones or soaker hoses to deliver a slow, steady offer of water. If curst significant rains, trench drainage off from your tomatoes (if possible). you’ll conjointly encourage new roots above the sodden ground by heaping compost around the base of the tomato plant. (Roots will drown if the soil is simply too wet.)

Pot grown plants especially could also be a lot of prone to blossom finish rot, thanks to problem keeping the soil wet enough. attempt self-watering containers or watering spikes in your container.

2. USE BALANCED fertilizer.

Aged manure or compost is nice, as tomatoes ar significant feeders – simply do not use an excessive amount of fresh stuff. There are smart organic fertilizers accessible to assist offer your plants a jump begin. For detailed planting directions, see “How to Grow Tomatoes Organically“.

3. confirm YOUR SOIL IS heat ENOUGH, however NOT TOO HOT.

Tomato seeds would like soil temps of a minimum of 60°F (15.6°C) to germinate. Transplants will move into the soil above 55°F (13°C), however, growth is slow.

A general rule of thumb is to attend for nighttime temperatures to be on top of 55°F. you’ll be able to simply take a look at your soil temps with a soil measuring system. to lift soil temperature, you’ll be able to cowl your planting space with black or red plastic – or wait. In the summer heat, organic mulch will keep roots from warming.

4. AVOID operating TOO near to THE ROOTS OF THE tomato plant.

Pull weeds after you have to be compelled to, however, do not attack the bottom on the brink of the tomato together with your hoe. Mulching helps limit the requirement for cultivation.


A soil pH scale around 6.2 to 6.8 is best for tomatoes. If you would like to try to to a soil check, you’ll be able to visit “Soil Testing – five straightforward Tests for Your Yard and Garden” for a lot of data.

Adjust with extra Ca through liming the garden bed to lift the pH scale.

Lowering the pH scale is best done over time through the use of organic mulches and compost. Leaf compost is especially effective. (You will use this meter to check each pH scale and wetness levels.)

6. ADD Calcium  TO YOUR SOIL.

I work in crushed eggshells at planting time. A handful of garden lime or also conjointly works. spread a sprinkling of lime onto the soil surface, add gently, cowl with mulch, and water well. There are rot stop sprays that will be applied to the tomato foliage.

7. Choose TOMATO VARIETIES THAT ar LESS prone to BLOSSOM finish ROT.

This is a bit difficult and maybe a smart reason to stay a garden journal. I’ve seen in my very own garden that some varieties are way more possible to develop rot than others.

In my garden this year, those varieties a lot of prone to blossom finish rot included San Marzano, Orange Banana, and higher Boy. Meanwhile, the remainder of the crop was largely unaffected. Amish Paste, Opalka, Blue Beauty, Stupice, Glacier, Black Cherry, Mortgage Lifter, Arkansas someone, Tigerella were among those while not a problem.