I had a beautiful plant but absolutely no head formation.
You are in zone 5a, so I would assume you are growing in a greenhouse or possibly a cold frame.
Romanesco is not truly Broccoli and not truly Cauliflower.
It is very temperamental to temperature and needs consistent water and highly organic soil to thrive.
It requires a slightly shaded location with alkaline soil and plenty of room to spread it's roots to spread.
Northern regions should plant in spring right after danger of frost has passed.
My Romanesco plants are about 2 feet tall and there's no sign of heading. Shouldn't there be heads forming by now?
It is still very early, and it appears that you have a shade cloth over them. They prefer full sun. They are quite a bit more heat tolerant than their cousins, broccoli and cauliflower. If you don't see flowers forming in another month or two, then I would think about adding some phosphorus and potassium to the soil.
Generally, in order for them to flower properly, you will want them quite a bit bigger. Patience will be key here.
This article will give you more information on the subject: https://www.gardeningknowhow.com/edible/vegetables/broccoli/growing-romanesco-broccoli.htm
This is my first year growing Romanesco. The seed packet said that I would have my first head by July 1. When you look at my plants, there is no sign of heading anywhere and I don't think I will get any heads from these plants. What can you tell me?
There are a few things to note here. Though they are more heat tolerant as far as Brassicas go... They will have a hard time in the heat of zone 7 (I'm in this zone too). Protecting from afternoon sun can help a little.
Another thing to consider is nutrient content of the soil. Too much nitrogen, or not enough potassium and phosphorus can halt flowering. This may need to be corrected for the future.
You may need to start these indoors under lighting well ahead of spring to give them enough of a mild temperature to finish outside before the heat comes.
This article will help: https://www.gardeningknowhow.com/edible/vegetables/broccoli/growing-romanesco-broccoli.htm
Hi, this is my romanesco. I've planted it approximately three weeks ago and it's been growing really good. since a few days now it got dark point on it, they don't look like insects but I couldn't find anything online about it. Do you have an idea what it could be? Thanks so much!!!
Yes, many of them have the tendency to purple growth. Sometimes it will stay, and many times it will turn the typical light green over time.
This article will help you to give them the best care:
I am growing romanesco for the first time. I have heads ready to cut and eat. My question is Will the plant will produce additional romanescos like brocolli or is the only one like cauliflower?
Being a direct relative of cauliflower, it will produce in the same manner, generally. Here is an article that will help you to care for the plant:
I am not sure when to start seeds indoors for Romanesco to be planted outdoors for fall harvest
Around now, outdoors, would be perfect! You can start them, indoors, too, but it is about that time to start them outside.