Per the product manufacturer the Ferti-Lome Yield Booster there is no shelf life on this product as long as you store it properly with not extreme heat or it doesn't freeze. It the calcium seperates in any way it would need to be replaced.
The Ferti-Lome Yield Booster is designed to be used as a foliar spray only; it will not uptake into the plants if only applied to the soil. We do sell other tomato fertilizers that are designed to be applied to the soil such as FoxFarm Happy Frog Tomato and Vegetable Organic Fertilizer 7-4-5. You can browse all our products labeled for blossom end rot here.
Mix 2 tablespoons (1 fluid ounce) with 1 gallon of water to stop blossom-end rot. Apply as a uniform spray to foliage and developing fruit. Make a spray application once every 7 days until 3 or 4 applications have been made. Apply in early morning when temperatures are cool to avoid burning foliage. Do not apply to plants under stress conditions. Regular spraying throughout the season is not recommended as these prolonged spray programs can cause foliage burn.
Ferti-Lome Yield Booster is intended to be used on tomatoes, not jalapeno peppers.
Per the manufacturer, Ferti-Lome Yield Booster can be sprayed on any edibles, flowers, ornamentals, etc. It is recommended that you do not spray in direct sunlight.
There is not a specific percentage of increase in yield when using Ferti-Lome Yield Booster if there is not any type of deficiency. It gives tomatoes more calcium and yield is increased when controlling blossom end rot.
Ideally you want to spray Ferti-Lome Yield Booster when there is no rain expected for 24 hours. If it rained sooner after application and it did not have time to dry, you will have to reapply.
Ferti-Lome Yield Booster should not cause wilting to tomato plants if applied per the product label instructions.
The product label states, Apply in early morning when temperatures are cool to avoid burning foliage. Do not apply to plants under stress conditions. Regular spraying throughout the season is not recommended as these prolonged spray programs can cause foliage burn."
The label for Ferti-Lome Yield Booster does not state that it is safe for grapes. We would recommend reaching out to the manufacturer for more information: VPG 855-270-4776.