THREE OLD RIDDLES

1)
To a word of consent, add one half of a fright,
Next subjoin what you never beheld in the night;
These rightly connected, you'll quickly obtain
What millions have seen, but will ne'er see again.

2)
My first a blessing sent to earth,
Of plants and flowers to aid their birth;
My second surely was designed
To hurl destruction on mankind;
My whole a pledge from pardoning heaven,
Of wrath appeased and sins forgiven.

3)
Ye riddling folk, disclose my name,
No doubt you quickly will descry it;
The self-same characters proclaim
The fruit, and how you'd wish to buy it.

HINT:
3. The answer is a common fruit and its anagram.

Answers:

1. Yesterday
2. Rainbow 
3. PEACH - CHEAP